feat(i18n): add Hungarian and Traditional Chinese locales

Complete and revise every shipped locale against the current English source, preserve locale-specific plurals, and map script-specific Chinese locales through device, Intl, duration, and Plex boundaries.

Co-authored-by: emgeje <mgj@mgj.hu>

Co-authored-by: junyou1998 <junyou1998@gmail.com>

test/widgets/video_settings_sheet_test.dart

@@ -92,7 +92,7 @@ void main() {
     await tester.pumpAndSettle();
 
     final dialog = find.byType(AlertDialog);
-    for (final label in ['Нет', 'Да', 'Масштабировать', 'Принудительно', 'Удалить стили']) {
+    for (final label in ['Нет', 'Да', 'Масштаб', 'Принудительно', 'Удалить стили']) {
       expect(find.descendant(of: dialog, matching: find.text(label)), findsOneWidget);
     }
   });