feat(i18n): add Traditional Chinese (zh-Hant) localization support

add Traditional Chinese translations for all application strings
include new language files for artist, history, donation, favorite, login, search, user, common, download, player, settings, comp components
update main i18n configuration to include zh-Hant language
add zh-Hant option to language switcher component

src/i18n/main.ts

@@ -1,9 +1,11 @@
 import enUS from './lang/en-US';
 import zhCN from './lang/zh-CN';
+import zhHant from './lang/zh-Hant';
 
 const messages = {
   'zh-CN': zhCN,
-  'en-US': enUS
+  'en-US': enUS,
+  'zh-Hant': zhHant
 } as const;
 
 type Language = keyof typeof messages;