replace bloc with watch_it

mobile-v2/lib/domain/services/app_setting.service.dart

@@ -0,0 +1,22 @@
+import 'package:immich_mobile/domain/models/app_setting.model.dart';
+import 'package:immich_mobile/domain/store_manager.dart';
+
+class AppSettingsService {
+  final StoreManager store;
+
+  const AppSettingsService(this.store);
+
+  T getSetting<T>(AppSettings<T> setting) {
+    return store.get(setting.storeKey, setting.defaultValue);
+  }
+
+  void setSetting<T>(AppSettings<T> setting, T value) {
+    store.put(setting.storeKey, value);
+  }
+
+  Stream<T> watchSetting<T>(AppSettings<T> setting) {
+    return store
+        .watch<T>(setting.storeKey)
+        .map((value) => value ?? setting.defaultValue);
+  }
+}