feat: fav topic

Signed-off-by: bggRGjQaUbCoE <githubaccount56556@proton.me>

lib/models/fav_topic/data.dart

@@ -0,0 +1,17 @@
+import 'package:PiliPlus/models/user/fav_topic/topic_list.dart';
+
+class FavTopicData {
+  TopicList? topicList;
+
+  FavTopicData({this.topicList});
+
+  factory FavTopicData.fromJson(Map<String, dynamic> json) => FavTopicData(
+        topicList: json['topic_list'] == null
+            ? null
+            : TopicList.fromJson(json['topic_list'] as Map<String, dynamic>),
+      );
+
+  Map<String, dynamic> toJson() => {
+        'topic_list': topicList?.toJson(),
+      };
+}