refactor(mobile): reworked Asset, store all required fields from local & remote (#1539)

replace usage of AssetResponseDto with Asset

Add new class ExifInfo to store data from ExifResponseDto

mobile/lib/shared/models/exif_info.dart

@@ -0,0 +1,86 @@
+import 'package:openapi/api.dart';
+import 'package:immich_mobile/utils/builtin_extensions.dart';
+
+class ExifInfo {
+  int? fileSize;
+  String? make;
+  String? model;
+  String? orientation;
+  String? lensModel;
+  double? fNumber;
+  double? focalLength;
+  int? iso;
+  double? exposureTime;
+  String? city;
+  String? state;
+  String? country;
+
+  ExifInfo.fromDto(ExifResponseDto dto)
+      : fileSize = dto.fileSizeInByte,
+        make = dto.make,
+        model = dto.model,
+        orientation = dto.orientation,
+        lensModel = dto.lensModel,
+        fNumber = dto.fNumber?.toDouble(),
+        focalLength = dto.focalLength?.toDouble(),
+        iso = dto.iso?.toInt(),
+        exposureTime = dto.exposureTime?.toDouble(),
+        city = dto.city,
+        state = dto.state,
+        country = dto.country;
+
+  // stuff below is only required for caching as JSON
+
+  ExifInfo(
+    this.fileSize,
+    this.make,
+    this.model,
+    this.orientation,
+    this.lensModel,
+    this.fNumber,
+    this.focalLength,
+    this.iso,
+    this.exposureTime,
+    this.city,
+    this.state,
+    this.country,
+  );
+
+  Map<String, dynamic> toJson() {
+    final json = <String, dynamic>{};
+    json["fileSize"] = fileSize;
+    json["make"] = make;
+    json["model"] = model;
+    json["orientation"] = orientation;
+    json["lensModel"] = lensModel;
+    json["fNumber"] = fNumber;
+    json["focalLength"] = focalLength;
+    json["iso"] = iso;
+    json["exposureTime"] = exposureTime;
+    json["city"] = city;
+    json["state"] = state;
+    json["country"] = country;
+    return json;
+  }
+
+  static ExifInfo? fromJson(dynamic value) {
+    if (value is Map) {
+      final json = value.cast<String, dynamic>();
+      return ExifInfo(
+        json["fileSize"],
+        json["make"],
+        json["model"],
+        json["orientation"],
+        json["lensModel"],
+        json["fNumber"],
+        json["focalLength"],
+        json["iso"],
+        json["exposureTime"],
+        json["city"],
+        json["state"],
+        json["country"],
+      );
+    }
+    return null;
+  }
+}