Flutter 更换剪切板的英文为中文

增加国际化支持。

先引个包

dependencies:
  flutter:
    sdk: flutter
  flutter_localizations:
    sdk: flutter

MaterialApp加入代码

runApp(MaterialApp(
    localizationsDelegates: [
      GlobalMaterialLocalizations.delegate,
      GlobalWidgetsLocalizations.delegate,
      GlobalCupertinoLocalizations.delegate,
    ],
    supportedLocales: [
      const Locale('zh', 'CN'),
      const Locale('en', 'US'),
    ],
));