✨ Support new feed API

✨ Able to add tag onto post

lib/models/feed.dart

@@ -0,0 +1,23 @@
+class FeedRecord {
+  String type;
+  Map<String, dynamic> data;
+  DateTime createdAt;
+
+  FeedRecord({
+    required this.type,
+    required this.data,
+    required this.createdAt,
+  });
+
+  factory FeedRecord.fromJson(Map<String, dynamic> json) => FeedRecord(
+        type: json['type'],
+        data: json['data'],
+        createdAt: DateTime.parse(json['created_at']),
+      );
+
+  Map<String, dynamic> toJson() => {
+        'type': type,
+        'data': data,
+        'created_at': createdAt.toIso8601String(),
+      };
+}