Refactor codebase resolving warnings and remove self-package imports

lib/model/chatList/chatListProps.dart

@@ -0,0 +1,27 @@
+
+import '../../api/apiResponse.dart';
+import '../../api/marianumcloud/talk/room/getRoomCache.dart';
+import '../../api/marianumcloud/talk/room/getRoomResponse.dart';
+import '../dataHolder.dart';
+
+class ChatListProps extends DataHolder {
+  GetRoomResponse? _getRoomResponse;
+  GetRoomResponse get getRoomsResponse => _getRoomResponse!;
+
+  @override
+  List<ApiResponse?> properties() {
+    return [_getRoomResponse];
+  }
+
+  @override
+  void run({renew}) {
+    GetRoomCache(
+      renew: renew,
+      onUpdate: (GetRoomResponse data) => {
+        _getRoomResponse = data,
+        notifyListeners(),
+      }
+    );
+  }
+
+}