refactor(mobile): use repositories in a number of services (#12891)

* UserService
* PartnerService
* HashService
* MemoryService
* PersonService
* SearchService
* StackService

mobile/lib/interfaces/partner_api.interface.dart

@@ -0,0 +1,13 @@
+import 'package:immich_mobile/entities/user.entity.dart';
+
+abstract interface class IPartnerApiRepository {
+  Future<List<User>> getAll(Direction direction);
+  Future<User> create(String id);
+  Future<User> update(String id, {required bool inTimeline});
+  Future<void> delete(String id);
+}
+
+enum Direction {
+  sharedWithMe,
+  sharedByMe,
+}