Add Windows CI/CD workflow and documentation

Introduces a GitHub Actions workflow for building and releasing YTSage Windows installers and portable ZIPs on version tag pushes. Includes a detailed CI/CD README explaining triggers, build steps, artifact handling, release notes, and troubleshooting.

.github/CI_CD_README.md

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+# YTSage CI/CD Workflow
+
+This repository uses GitHub Actions to automatically build and release YTSage for Windows when version tags are pushed.
+
+## How It Works
+
+### Trigger
+The workflow is triggered when you push a git tag that starts with `v` (e.g., `v4.8.0`, `v4.9.1`).
+
+### Build Process
+1. **Setup**: Uses Python 3.12.10 on Windows
+2. **Builds**: Creates both Standard and FFmpeg versions
+3. **Packages**: Generates MSI installers and ZIP portable versions
+4. **Release**: Creates a draft GitHub release with all artifacts
+
+## Usage
+
+### Creating a Release
+
+1. **Update version** in your source code if needed
+2. **Commit your changes**:
+   ```bash
+   git add .
+   git commit -m "Release v4.8.0"
+   ```
+
+3. **Create and push a tag**:
+   ```bash
+   git tag v4.8.0
+   git push origin v4.8.0
+   ```
+
+4. **Watch the action**: Go to Actions tab in GitHub to monitor progress
+
+5. **Review draft release**: Once complete, check the Releases section for the draft
+
+### Release Artifacts
+
+The workflow creates the following files:
+
+- `YTSage-v<version>.msi` - Standard Windows installer
+- `YTSage-v<version>.zip` - Standard portable version
+- `YTSage-v<version>-ffmpeg.msi` - FFmpeg bundle installer
+- `YTSage-v<version>-ffmpeg.zip` - FFmpeg bundle portable
+
+### Release Notes
+
+Automatic release notes are generated including:
+- Download links and descriptions
+- Installation instructions
+- System requirements
+- Feature highlights
+
+## Workflow Features
+
+### Automatic Version Detection
+- Extracts version from git tag (removes 'v' prefix)
+- Updates setup.py files with correct version
+- Names all artifacts consistently
+
+### Caching
+- Python dependencies are cached to speed up builds
+- Virtual environment is cached between runs
+
+### Error Handling
+- Comprehensive error checking at each step
+- Detailed logging for troubleshooting
+- Artifact verification before upload
+
+### Security
+- Uses official GitHub Actions
+- No external dependencies
+- Secure token handling
+
+## Manual Intervention
+
+### After Workflow Completion
+1. **Review the draft release** in GitHub
+2. **Test the artifacts** if needed
+3. **Edit release notes** if desired
+4. **Publish the release** when ready
+
+### Troubleshooting
+If the workflow fails:
+1. Check the Actions logs for error details
+2. Ensure all required files are present
+3. Verify the tag format is correct (`v*`)
+4. Check that dependencies are properly listed
+
+## Configuration
+
+### Modifying the Workflow
+The workflow file is located at `.github/workflows/build-windows.yml`.
+
+Key configuration options:
+- `PYTHON_VERSION`: Python version to use
+- Artifact naming patterns
+- Release note templates
+
+### Adding New Build Types
+To add new build configurations:
+1. Create new setup-*.py files
+2. Add build steps to the workflow
+3. Update artifact collection logic
+
+## Notes
+
+- The workflow only runs on Windows
+- Requires Python 3.12.10 for MSI compatibility
+- All builds use cx_Freeze for packaging
+- FFmpeg binaries are expected in standard locations
+- Draft releases allow for review before publication
+
+## Example Tag Commands
+
+```bash
+# For a new release
+git tag v4.8.0
+git push origin v4.8.0
+
+# For a patch release
+git tag v4.8.1
+git push origin v4.8.1
+
+# To delete a tag (if needed)
+git tag -d v4.8.0
+git push origin :refs/tags/v4.8.0
+```

.github/workflows/build-windows.yml

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+name: Build Windows Release
+
+on:
+  push:
+    tags:
+      - 'v*        # Update setup.py
+        $setupContent = Get-Content "build/windows/setup.py" -Raw
+        $setupContent = $setupContent -replace 'version\s*=\s*["\'][^"\']*["\']', "version='$version'"
+        Set-Content "build/windows/setup.py" -Value $setupContent
+        
+        # Update setup-ffmpeg.py
+        $setupFFmpegContent = Get-Content "build/windows/setup-ffmpeg.py" -Raw
+        $setupFFmpegContent = $setupFFmpegContent -replace 'version\s*=\s*["\'][^"\']*["\']', "version='$version'"
+        Set-Content "build/windows/setup-ffmpeg.py" -Value $setupFFmpegContent
+        
+        # Update build script
+        $buildScript = Get-Content "build/windows/windows-build-universal.ps1" -Raw
+        $buildScript = $buildScript -replace '\$SCRIPT_VERSION\s*=\s*["\'][^"\']*["\']', "`$SCRIPT_VERSION = '$version'"
+        Set-Content "build/windows/windows-build-universal.ps1" -Value $buildScripton version tags like v4.8.0, v4.8.1, etc.
+
+env:
+  PYTHON_VERSION: '3.12.10'
+  
+jobs:
+  build-windows:
+    runs-on: windows-latest
+    
+    steps:
+    - name: Checkout code
+      uses: actions/checkout@v4
+      with:
+        fetch-depth: 0
+    
+    - name: Extract version from tag
+      id: get_version
+      shell: powershell
+      run: |
+        $tag = "${{ github.ref_name }}"
+        $version = $tag -replace '^v', ''
+        echo "VERSION=$version" >> $env:GITHUB_OUTPUT
+        echo "TAG=$tag" >> $env:GITHUB_OUTPUT
+        Write-Host "Extracted version: $version from tag: $tag"
+    
+    - name: Set up Python ${{ env.PYTHON_VERSION }}
+      uses: actions/setup-python@v4
+      with:
+        python-version: ${{ env.PYTHON_VERSION }}
+    
+    - name: Cache Python dependencies
+      uses: actions/cache@v3
+      with:
+        path: |
+          ~\AppData\Local\pip\Cache
+          venv
+        key: ${{ runner.os }}-python-${{ env.PYTHON_VERSION }}-${{ hashFiles('requirements.txt') }}
+        restore-keys: |
+          ${{ runner.os }}-python-${{ env.PYTHON_VERSION }}-
+    
+    - name: Create virtual environment and install dependencies
+      shell: powershell
+      run: |
+        Write-Host "Creating virtual environment..."
+        python -m venv venv
+        .\venv\Scripts\Activate.ps1
+        
+        Write-Host "Installing dependencies..."
+        python -m pip install --upgrade pip
+        pip install -r requirements.txt
+        pip install cx_Freeze
+        
+        Write-Host "Verifying installation..."
+        python --version
+        pip list
+    
+    - name: Update version in source files
+      shell: powershell
+      run: |
+        $version = "${{ steps.get_version.outputs.VERSION }}"
+        Write-Host "Updating version to: $version"
+        
+        # Update setup.py
+        $setupContent = Get-Content "setup.py" -Raw
+        $setupContent = $setupContent -replace 'version\s*=\s*["\'][^"\']*["\']', "version='$version'"
+        Set-Content "setup.py" -Value $setupContent
+        
+        # Update setup-ffmpeg.py
+        $setupFFmpegContent = Get-Content "setup-ffmpeg.py" -Raw
+        $setupFFmpegContent = $setupFFmpegContent -replace 'version\s*=\s*["\'][^"\']*["\']', "version='$version'"
+        Set-Content "setup-ffmpeg.py" -Value $setupFFmpegContent
+        
+        # Update build scripts version
+        $buildScript = Get-Content "windows-build-universal.ps1" -Raw
+        $buildScript = $buildScript -replace '\$SCRIPT_VERSION\s*=\s*["\'][^"\']*["\']', "`$SCRIPT_VERSION = '$version'"
+        Set-Content "windows-build-universal.ps1" -Value $buildScript
+        
+        Write-Host "Version updated in all files"
+    
+    - name: Build Standard Version (MSI + ZIP)
+      shell: powershell
+      run: |
+        .\venv\Scripts\Activate.ps1
+        Write-Host "Building Standard Version..."
+        .\build\windows\windows-build-universal.ps1 -Verbose
+    
+    - name: Build FFmpeg Version (MSI + ZIP)
+      shell: powershell
+      run: |
+        .\venv\Scripts\Activate.ps1
+        Write-Host "Building FFmpeg Version..."
+        .\build\windows\windows-build-universal.ps1 -FFmpeg -Verbose
+    
+    - name: Prepare release artifacts
+      shell: powershell
+      run: |
+        $version = "${{ steps.get_version.outputs.VERSION }}"
+        Write-Host "Preparing artifacts for version: $version"
+        
+        # Create artifacts directory
+        New-Item -ItemType Directory -Force -Path "artifacts"
+        
+        # List all files in releases directory
+        Write-Host "Files in releases directory:"
+        Get-ChildItem "releases" -Recurse | ForEach-Object { Write-Host $_.FullName }
+        
+        # Copy and rename artifacts with proper versioning
+        $standardMsi = Get-ChildItem "releases" -Filter "*YTSage*.msi" | Where-Object { $_.Name -notlike "*ffmpeg*" } | Select-Object -First 1
+        $standardZip = Get-ChildItem "releases" -Filter "*YTSage*portable*.zip" | Where-Object { $_.Name -notlike "*ffmpeg*" } | Select-Object -First 1
+        $ffmpegMsi = Get-ChildItem "releases" -Filter "*ffmpeg*.msi" | Select-Object -First 1
+        $ffmpegZip = Get-ChildItem "releases" -Filter "*ffmpeg*portable*.zip" | Select-Object -First 1
+        
+        if ($standardMsi) {
+          Copy-Item $standardMsi.FullName "artifacts\YTSage-v$version.msi"
+          Write-Host "Copied: $($standardMsi.Name) -> YTSage-v$version.msi"
+        }
+        
+        if ($standardZip) {
+          Copy-Item $standardZip.FullName "artifacts\YTSage-v$version.zip"
+          Write-Host "Copied: $($standardZip.Name) -> YTSage-v$version.zip"
+        }
+        
+        if ($ffmpegMsi) {
+          Copy-Item $ffmpegMsi.FullName "artifacts\YTSage-v$version-ffmpeg.msi"
+          Write-Host "Copied: $($ffmpegMsi.Name) -> YTSage-v$version-ffmpeg.msi"
+        }
+        
+        if ($ffmpegZip) {
+          Copy-Item $ffmpegZip.FullName "artifacts\YTSage-v$version-ffmpeg.zip"
+          Write-Host "Copied: $($ffmpegZip.Name) -> YTSage-v$version-ffmpeg.zip"
+        }
+        
+        # Verify artifacts
+        Write-Host "Final artifacts:"
+        Get-ChildItem "artifacts" | ForEach-Object { 
+          Write-Host "$($_.Name) - $([math]::Round($_.Length / 1MB, 2)) MB"
+        }
+    
+    - name: Create Release Notes
+      shell: powershell
+      run: |
+        $version = "${{ steps.get_version.outputs.VERSION }}"
+        $tag = "${{ steps.get_version.outputs.TAG }}"
+        $releaseDate = Get-Date -Format "yyyy-MM-dd"
+        
+        $releaseNotes = @"
+# YTSage $version
+
+Released: $releaseDate
+
+## Downloads
+
+### Standard Version
+- **YTSage-v$version.msi** - Windows Installer (Recommended)
+- **YTSage-v$version.zip** - Portable ZIP (No installation required)
+
+### FFmpeg Bundle Version
+- **YTSage-v$version-ffmpeg.msi** - Windows Installer with FFmpeg included
+- **YTSage-v$version-ffmpeg.zip** - Portable ZIP with FFmpeg included
+
+## Installation
+
+### MSI Installer (Recommended)
+1. Download the `.msi` file
+2. Double-click to install
+3. Follow the installation wizard
+
+### Portable ZIP
+1. Download the `.zip` file
+2. Extract to your preferred location
+3. Run `YTSage.exe`
+
+## System Requirements
+
+- Windows 10/11 (64-bit)
+- .NET Framework (usually pre-installed)
+- Internet connection for yt-dlp updates
+
+## Notes
+
+- Standard version: Downloads FFmpeg automatically when needed
+- FFmpeg bundle: Includes FFmpeg binaries for offline use
+
+---
+
+**Full Changelog**: https://github.com/${{ github.repository }}/compare/v${{ steps.get_version.outputs.VERSION }}...HEAD
+"@
+        
+        Set-Content "artifacts\RELEASE_NOTES.md" -Value $releaseNotes
+        Write-Host "Release notes created"
+    
+    - name: Upload artifacts
+      uses: actions/upload-artifact@v3
+      with:
+        name: windows-release-${{ steps.get_version.outputs.VERSION }}
+        path: artifacts/
+        retention-days: 30
+    
+    - name: Create Draft Release
+      uses: softprops/action-gh-release@v1
+      with:
+        tag_name: ${{ steps.get_version.outputs.TAG }}
+        name: YTSage ${{ steps.get_version.outputs.VERSION }}
+        body_path: artifacts/RELEASE_NOTES.md
+        draft: true
+        prerelease: false
+        files: |
+          artifacts/YTSage-v${{ steps.get_version.outputs.VERSION }}.msi
+          artifacts/YTSage-v${{ steps.get_version.outputs.VERSION }}.zip
+          artifacts/YTSage-v${{ steps.get_version.outputs.VERSION }}-ffmpeg.msi
+          artifacts/YTSage-v${{ steps.get_version.outputs.VERSION }}-ffmpeg.zip
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}