Add FFmpeg updater module and GUI integration

Introduces a new FFmpeg updater module for checking and updating FFmpeg to the latest essentials build, with progress reporting and version comparison. Updates language files with new translation keys for the updater in multiple languages. Refactors Windows FFmpeg installation to use the new updater logic. Adds UpdaterTabWidget to the GUI dialogs for integration of the updater into the application's interface.

languages/id.json

@@ -99,7 +99,8 @@
     "cookies": "Masuk dengan cookies",
     "custom_command": "Perintah khusus",
     "proxy": "Proxy",
-    "language": "Bahasa"
+    "language": "Bahasa",
+    "updater": "Pembaruan"
   },
   "cookies": {
     "help_text": "Pilih cara memberikan cookies untuk autentikasi.\nIni memungkinkan pengunduhan video pribadi dan file audio berkualitas tinggi.",
@@ -466,5 +467,24 @@
     "redownload_confirm_title": "Unduh Lagi?",
     "redownload_confirm_message": "Unduh lagi?\n\n{title}",
     "redownload_started": "Unduhan dimulai"
+  },
+  "ffmpeg_updater": {
+    "title": "Pembaruan FFmpeg",
+    "current_version": "Versi Saat Ini:",
+    "latest_version": "Versi Terbaru:",
+    "status_up_to_date": "✓ Terbaru",
+    "status_update_available": "⚠ Pembaruan tersedia",
+    "status_not_installed": "✗ Tidak terinstal",
+    "status_checking": "🔄 Memeriksa pembaruan...",
+    "status_downloading": "⬇ Mengunduh FFmpeg...",
+    "status_installing": "⚙ Menginstal FFmpeg...",
+    "status_verifying": "✓ Memverifikasi integritas...",
+    "check_updates": "Periksa Pembaruan",
+    "update_button": "Perbarui FFmpeg",
+    "update_success": "FFmpeg berhasil diperbarui ke versi {version}!",
+    "update_failed": "Gagal memperbarui FFmpeg. Silakan coba lagi.",
+    "check_failed": "Gagal memeriksa pembaruan. Periksa koneksi internet Anda.",
+    "install_first": "FFmpeg tidak terinstal. Klik Perbarui untuk menginstal.",
+    "description": "Jaga FFmpeg tetap terbaru untuk performa dan kompatibilitas terbaik."
   }
 }