feat(content_management): add source_type_l10n import to create_source_page

- Import SourceTypeL10n extension to support localization of source types
- This change enhances the page's ability to display source types in different languages

Author: fulleni

lib/content_management/view/create_source_page.dart

@@ -4,6 +4,7 @@ import 'package:flutter/material.dart';
 import 'package:flutter_bloc/flutter_bloc.dart';
 import 'package:flutter_news_app_web_dashboard_full_source_code/content_management/bloc/content_management_bloc.dart';
 import 'package:flutter_news_app_web_dashboard_full_source_code/content_management/bloc/create_source/create_source_bloc.dart';
+import 'package:flutter_news_app_web_dashboard_full_source_code/shared/extensions/source_type_l10n.dart';
 import 'package:flutter_news_app_web_dashboard_full_source_code/l10n/l10n.dart';
 import 'package:flutter_news_app_web_dashboard_full_source_code/shared/shared.dart';
 import 'package:go_router/go_router.dart';