feat(l10n): add localization extension for PushNotificationProvider

- Create new extension file for PushNotificationProvider enum
- Implement l10n method to return localized string representations
- Add cases for firebase and oneSignal push notification providers

Author: fulleni

lib/app_configuration/widgets/push_notification_settings_form.dart

@@ -1,5 +1,6 @@
 import 'package:core/core.dart';
 import 'package:flutter/material.dart';
+import 'package:flutter_news_app_web_dashboard_full_source_code/l10n/app_localizations.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/extensions/push_notification_provider_l10n.dart';
 import 'package:flutter_news_app_web_dashboard_full_source_code/shared/extensions/push_notification_subscription_delivery_type_l10n.dart';

lib/shared/extensions/extensions.dart

@@ -6,5 +6,7 @@ export 'content_status_l10n.dart';
 export 'dashboard_user_role_l10n.dart';
 export 'feed_decorator_type_l10n.dart';
 export 'in_article_ad_slot_type_l10n.dart';
+export 'push_notification_provider_l10n.dart';
+export 'push_notification_subscription_delivery_type_l10n.dart';
 export 'source_type_l10n.dart';
 export 'string_truncate.dart';

lib/shared/extensions/push_notification_provider_l10n.dart

@@ -0,0 +1,18 @@
+import 'package:core/core.dart';
+import 'package:flutter/material.dart';
+import 'package:flutter_news_app_web_dashboard_full_source_code/l10n/l10n.dart';
+
+/// Extension to localize the [PushNotificationProvider] enum.
+extension PushNotificationProviderL10n on PushNotificationProvider {
+  /// Returns the localized string representation of the
+  /// [PushNotificationProvider].
+  String l10n(BuildContext context) {
+    final l10n = AppLocalizationsX(context).l10n;
+    switch (this) {
+      case PushNotificationProvider.firebase:
+        return l10n.pushNotificationProviderFirebase;
+      case PushNotificationProvider.oneSignal:
+        return l10n.pushNotificationProviderOneSignal;
+    }
+  }
+}