feat(content_management): Add HTUIKit dependency

- Added HTUIKit dependency to create_headline_page.dart

Author: fulleni

lib/content_management/view/create_headline_page.dart

@@ -8,6 +8,7 @@ import 'package:ht_dashboard/shared/constants/pagination_constants.dart';
 import 'package:ht_dashboard/shared/shared.dart';
 import 'package:ht_data_repository/ht_data_repository.dart';
 import 'package:ht_shared/ht_shared.dart';
+import 'package:ht_ui_kit/ht_ui_kit.dart';
 
 /// {@template create_headline_page}
 /// A page for creating a new headline.