* unread message count for group chat and single chat

* leave group chat
* group chat page which can update group name and upgrade users to admin if i the group creator and update group image
* kick users from group
* admin downgrade and upgrade system if iam admin
* admins can add users only

example/lib/main.dart

@@ -7,7 +7,7 @@ import './screens/splash_screen.dart';
 import 'controllers/app_controller.dart';
 import 'generated/l10n.dart';
 
-const isUseRealServer = false;
+const isUseRealServer = true;
 
 class VChatCustomWidgets extends VChatWidgetBuilder {
   @override