first implementation finished

app/lib/features/settings/presentation/controllers/save_settings.dart

@@ -0,0 +1,19 @@
+import 'package:kagi_bang_bang/features/settings/data/repositories/settings_repository.dart';
+import 'package:riverpod_annotation/riverpod_annotation.dart';
+
+part 'save_settings.g.dart';
+
+@riverpod
+class SaveSettingsController extends _$SaveSettingsController {
+  @override
+  FutureOr<void> build() {}
+
+  Future<void> save(UpdateSettingsFunc updateSettings) async {
+    state = const AsyncLoading();
+    state = await AsyncValue.guard(
+      () => ref
+          .read(settingsRepositoryProvider.notifier)
+          .updateSettings(updateSettings),
+    );
+  }
+}