feat: at user

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

lib/models_new/dynamic/dyn_mention/data.dart

@@ -0,0 +1,13 @@
+import 'package:PiliPlus/models_new/dynamic/dyn_mention/group.dart';
+
+class DynMentionData {
+  List<MentionGroup>? groups;
+
+  DynMentionData({this.groups});
+
+  factory DynMentionData.fromJson(Map<String, dynamic> json) => DynMentionData(
+        groups: (json['groups'] as List<dynamic>?)
+            ?.map((e) => MentionGroup.fromJson(e as Map<String, dynamic>))
+            .toList(),
+      );
+}