feat: add internationalization support and update layout

- Added i18n module to nuxt.config.ts with English and Traditional Chinese locales.
- Created locale files for English, Traditional Chinese, and German.
- Updated default layout to use script setup syntax.
- Modified index page structure for future content.
- Implemented API endpoint for object storage file redirection.
- Removed unused CORS middleware.
- Created a new feed route handler.

nuxt.config.ts

@@ -1,9 +1,18 @@
+const { t } = useI18n();
 export default defineNuxtConfig({
   compatibilityDate: '2025-05-06',
   devtools: { enabled: true },
   modules: [
     '@nuxt/image',
     '@nuxtjs/robots',
-    '@nuxtjs/seo'
-  ]
+    '@nuxtjs/seo',
+    '@nuxtjs/i18n'
+  ],
+  i18n: {
+    defaultLocale: 'en',
+    locales: [
+      { code: 'en', name: 'English', file: 'en.json' },
+      { code: 'zh_tw', name: 'Chinese Tradional', file: 'zh-tw.json' },
+    ]
+  },
 })