Add Simplified Chinese translation support

lib/src/localization/app_localizations.g.dart

@@ -8,6 +8,9 @@ import 'package:intl/intl.dart' as intl;
 import 'app_localizations_de.g.dart';
 import 'app_localizations_en.g.dart';
 import 'app_localizations_es.g.dart';
+import 'app_localizations_zh.g.dart';
+
+// ignore_for_file: type=lint
 
 /// Callers can lookup localized strings with an instance of AppLocalizations
 /// returned by `AppLocalizations.of(context)`.
@@ -61,15 +64,17 @@ import 'app_localizations_es.g.dart';
 /// be consistent with the languages listed in the AppLocalizations.supportedLocales
 /// property.
 abstract class AppLocalizations {
-  AppLocalizations(String locale) : localeName = intl.Intl.canonicalizedLocale(locale.toString());
+  AppLocalizations(String locale)
+    : localeName = intl.Intl.canonicalizedLocale(locale.toString());
 
   final String localeName;
 
   static AppLocalizations? of(BuildContext context) {
     return Localizations.of<AppLocalizations>(context, AppLocalizations);
   }
 
-  static const LocalizationsDelegate<AppLocalizations> delegate = _AppLocalizationsDelegate();
+  static const LocalizationsDelegate<AppLocalizations> delegate =
+      _AppLocalizationsDelegate();
 
   /// A list of this localizations delegate along with the default localizations
   /// delegates.
@@ -81,18 +86,20 @@ abstract class AppLocalizations {
   /// Additional delegates can be added by appending to this list in
   /// MaterialApp. This list does not have to be used at all if a custom list
   /// of delegates is preferred or required.
-  static const List<LocalizationsDelegate<dynamic>> localizationsDelegates = <LocalizationsDelegate<dynamic>>[
-    delegate,
-    GlobalMaterialLocalizations.delegate,
-    GlobalCupertinoLocalizations.delegate,
-    GlobalWidgetsLocalizations.delegate,
-  ];
+  static const List<LocalizationsDelegate<dynamic>> localizationsDelegates =
+      <LocalizationsDelegate<dynamic>>[
+        delegate,
+        GlobalMaterialLocalizations.delegate,
+        GlobalCupertinoLocalizations.delegate,
+        GlobalWidgetsLocalizations.delegate,
+      ];
 
   /// A list of this localizations delegate's supported locales.
   static const List<Locale> supportedLocales = <Locale>[
     Locale('en'),
     Locale('de'),
-    Locale('es')
+    Locale('es'),
+    Locale('zh'),
   ];
 
   /// Default signature text
@@ -1815,7 +1822,10 @@ abstract class AppLocalizations {
   ///
   /// In en, this message translates to:
   /// **'Your account {accountName} might support so called + aliases like {example}.\nA + alias helps you to protect your identity and helps you against spam.\nTo test this, a test message will be sent to this generated address. If it arrives, your provider supports + aliases and you can easily generate them on demand when writing a new mail message.'**
-  String editAccountTestPlusAliasStepIntroductionText(String accountName, String example);
+  String editAccountTestPlusAliasStepIntroductionText(
+    String accountName,
+    String example,
+  );
 
   /// Title while testing concept of + aliases.
   ///
@@ -1935,7 +1945,10 @@ abstract class AppLocalizations {
   ///
   /// In en, this message translates to:
   /// **'Maily cannot reach the specified mail server. Please check your incoming server setting \"{incomingHost}\" and your outgoing server setting \"{outgoingHost}\".'**
-  String accountDetailsErrorHostProblem(String incomingHost, String outgoingHost);
+  String accountDetailsErrorHostProblem(
+    String incomingHost,
+    String outgoingHost,
+  );
 
   /// Error details when login fails
   ///
@@ -3066,7 +3079,8 @@ abstract class AppLocalizations {
   String get durationEmpty;
 }
 
-class _AppLocalizationsDelegate extends LocalizationsDelegate<AppLocalizations> {
+class _AppLocalizationsDelegate
+    extends LocalizationsDelegate<AppLocalizations> {
   const _AppLocalizationsDelegate();
 
   @override
@@ -3075,26 +3089,30 @@ class _AppLocalizationsDelegate extends LocalizationsDelegate<AppLocalizations>
   }
 
   @override
-  bool isSupported(Locale locale) => <String>['de', 'en', 'es'].contains(locale.languageCode);
+  bool isSupported(Locale locale) =>
+      <String>['de', 'en', 'es', 'zh'].contains(locale.languageCode);
 
   @override
   bool shouldReload(_AppLocalizationsDelegate old) => false;
 }
 
 AppLocalizations lookupAppLocalizations(Locale locale) {
-
-
   // Lookup logic when only language code is specified.
   switch (locale.languageCode) {
-    case 'de': return AppLocalizationsDe();
-    case 'en': return AppLocalizationsEn();
-    case 'es': return AppLocalizationsEs();
+    case 'de':
+      return AppLocalizationsDe();
+    case 'en':
+      return AppLocalizationsEn();
+    case 'es':
+      return AppLocalizationsEs();
+    case 'zh':
+      return AppLocalizationsZh();
   }
 
   throw FlutterError(
     'AppLocalizations.delegate failed to load unsupported locale "$locale". This is likely '
     'an issue with the localizations generation tool. Please file an issue '
     'on GitHub with a reproducible sample app and the gen-l10n configuration '
-    'that was used.'
+    'that was used.',
   );
 }