Simplify debouncer implementation (simple timer without streams)

lib/src/features/movies/presentation/movies/movies_search_query_notifier.dart

@@ -7,39 +7,26 @@ part 'movies_search_query_notifier.g.dart';
 @riverpod
 class MoviesSearchQueryNotifier extends _$MoviesSearchQueryNotifier {
   /// Used to debounce the input queries
-  final _searchQueryController = StreamController<String>.broadcast();
   Timer? _debounceTimer;
-  late final StreamSubscription<String> _subscription;
 
   @override
   String build() {
-    // Listen to the stream of input queries
-    _subscription = _searchQueryController.stream.listen((query) {
-      // Cancel existing timer if there is one
-      _debounceTimer?.cancel();
-      // Set a new timer to debounce the query
-      _debounceTimer = Timer(const Duration(milliseconds: 500), () {
-        _updateState(query);
-      });
-    });
-
     // don't forget to close the StreamController and cancel the subscriptions on dispose
     ref.onDispose(() {
-      _searchQueryController.close();
-      _subscription.cancel();
       _debounceTimer?.cancel();
     });
-
     // by default, return an empty query
     return '';
   }
 
-  void _updateState(String query) {
-    // only update the state once the query has been debounced
-    state = query;
-  }
-
   void setQuery(String query) {
-    _searchQueryController.sink.add(query);
+    // Cancel the timer if it is active
+    if (_debounceTimer != null) {
+      _debounceTimer!.cancel();
+    }
+    _debounceTimer = Timer(const Duration(milliseconds: 500), () {
+      // only update the state once the query has been debounced
+      state = query;
+    });
   }
 }