refactor(mobile): more repositories (#12879)

* ExifInfoRepository
 * ActivityApiRepository
 * initial AssetApiRepository

mobile/lib/interfaces/exif_info.interface.dart

@@ -0,0 +1,9 @@
+import 'package:immich_mobile/entities/exif_info.entity.dart';
+
+abstract interface class IExifInfoRepository {
+  Future<ExifInfo?> get(int id);
+
+  Future<ExifInfo> update(ExifInfo exifInfo);
+
+  Future<void> delete(int id);
+}