refactor(mobile): services and providers (#9232)

* refactor(mobile): services and provider

* providers

mobile/lib/providers/tab.provider.dart

@@ -0,0 +1,13 @@
+import 'package:hooks_riverpod/hooks_riverpod.dart';
+
+enum TabEnum {
+  home,
+  search,
+  sharing,
+  library,
+}
+
+/// Provides the currently active tab
+final tabProvider = StateProvider<TabEnum>(
+  (ref) => TabEnum.home,
+);