Add Deno setup and integration to application

Introduces Deno binary management, setup dialog, and download/verification logic. Updates localization files for Deno setup messages in all supported languages. Integrates Deno setup checks into main.py and GUI initialization, and adds Deno constants for platform-specific downloads.

main.py

@@ -4,6 +4,7 @@ from PySide6.QtWidgets import QApplication, QMessageBox
 
 from src.utils.ytsage_logger import logger
 from src.core.ytsage_yt_dlp import check_ytdlp_binary, setup_ytdlp  # Import the new yt-dlp setup functions
+from src.core.ytsage_deno import check_deno_binary, setup_deno  # Import the new Deno setup functions
 from src.gui.ytsage_gui_main import YTSageApp  # Import the main application class from ytsage_gui_main
 
 
@@ -29,6 +30,13 @@ def main():
             if yt_dlp_path == "yt-dlp":  # If user canceled or something went wrong
                 logger.warning("yt-dlp not configured properly")
 
+        # Check for Deno binary
+        if not check_deno_binary():
+            logger.warning("No Deno binary found, starting setup process")
+            deno_path = setup_deno()
+            if deno_path == "deno":  # If user canceled or something went wrong
+                logger.warning("Deno not configured properly")
+
         window = YTSageApp()  # Instantiate the main application class
         window.show()
         logger.info("Application window shown, entering main loop")