feat: add Settings tab with provider management and language preferences

- Implemented AppSettings model and table using SQLModel.
- Created Settings router with endpoints for preferences and provider toggling.
- Added Settings tab to the UI with real-time health status of providers.
- Integrated language and provider filtering into anime and series search logic.
- Updated templates to respect user-defined settings.

app/routers/__init__.py

@@ -10,8 +10,9 @@ from app.routers.router_recommendations import router as recommendations_router
 from app.routers.router_watchlist import router as watchlist_router
 from app.routers.router_sonarr import router as sonarr_router
 from app.routers.router_player import router as player_router
-from app.routers.router_static import router as static_router
-from app.routers.router_root import router as root_router
+from .router_static import router as static_router
+from .router_root import router as root_router
+from .router_settings import router as settings_router
 
 __all__ = [
     "auth_router",
@@ -24,4 +25,6 @@ __all__ = [
     "player_router",
     "static_router",
     "root_router",
+    "settings_router",
 ]
+