feat: choose language

lib/l10n/app_en.arb

@@ -19,5 +19,6 @@
     "disconnect": "Disconnect",
     "use": "Use It",
     "configNameComment": "Write a name for this config",
-    "showWindow": "Show Window"
+    "showWindow": "Show Window",
+    "chooseLanguage": "Choose Language"
 }

lib/l10n/app_zh.arb

@@ -19,5 +19,6 @@
     "disconnect": "断开连接",
     "use": "使用",
     "configNameComment": "给这个配置备注一个名字",
-    "showWindow": "显示主面板"
+    "showWindow": "显示主面板",
+    "chooseLanguage": "选择语言"
 }

lib/setting_page.dart

@@ -31,14 +31,21 @@ class _SettingPageState extends State<SettingPage> {
             ),
           ],
         ),
+        Row(
+          mainAxisAlignment: MainAxisAlignment.center,
+          children: [
+            Text(AppLocalizations.of(context)!.chooseLanguage),
+            const SizedBox(
+              width: 10,
+            ),
             DropdownButton<Locale>(
               value: Localizations.localeOf(context),
-          items:
-              AppLocalizations.supportedLocales.map<DropdownMenuItem<Locale>>(
+              items: AppLocalizations.supportedLocales
+                  .map<DropdownMenuItem<Locale>>(
                 (e) {
                   return DropdownMenuItem(
                     value: e,
-                child: Text(e.toString()),
+                    child: Text(e.toString() == 'en' ? 'English' : '中文'),
                   );
                 },
               ).toList(),
@@ -48,6 +55,8 @@ class _SettingPageState extends State<SettingPage> {
                 });
               },
             ),
+          ],
+        ),
         ElevatedButton(
           onPressed: () {
             ScaffoldMessenger.of(context)