Added holidays viewer

lib/api/holidays/getHolidaysResponse.dart

@@ -0,0 +1,38 @@
+
+import 'package:json_annotation/json_annotation.dart';
+
+import '../apiResponse.dart';
+
+part 'getHolidaysResponse.g.dart';
+
+@JsonSerializable(explicitToJson: true)
+class GetHolidaysResponse extends ApiResponse {
+  List<GetHolidaysResponseObject> data;
+
+  GetHolidaysResponse(this.data);
+
+  factory GetHolidaysResponse.fromJson(Map<String, dynamic> json) => _$GetHolidaysResponseFromJson(json);
+  Map<String, dynamic> toJson() => _$GetHolidaysResponseToJson(this);
+}
+
+@JsonSerializable()
+class GetHolidaysResponseObject {
+  String start;
+  String end;
+  int year;
+  String stateCode;
+  String name;
+  String slug;
+
+  GetHolidaysResponseObject({
+    required this.start,
+    required this.end,
+    required this.year,
+    required this.stateCode,
+    required this.name,
+    required this.slug
+  });
+
+  factory GetHolidaysResponseObject.fromJson(Map<String, dynamic> json) => _$GetHolidaysResponseObjectFromJson(json);
+  Map<String, dynamic> toJson() => _$GetHolidaysResponseObjectToJson(this);
+}