refactor(l10n): update import path for AppLocalizations

- Change import path from 'package:ht_dashboard/l10n/app_localizations.dart'
  to 'package:flutter_news_app_web_dashboard_full_source_code/l10n/app_localizations.dart'
- This modification affects the AppLocalizationsX extension method

Author: fulleni

lib/l10n/l10n.dart

@@ -1,5 +1,5 @@
 import 'package:flutter/widgets.dart';
-import 'package:ht_dashboard/l10n/app_localizations.dart';
+import 'package:flutter_news_app_web_dashboard_full_source_code/l10n/app_localizations.dart';
 
 extension AppLocalizationsX on BuildContext {
   AppLocalizations get l10n => AppLocalizations.of(this);