build: configure Cloudflare Pages deployment

- Add wrangler CLI and workerd runtime as dev dependencies
- Configure nitro prerender with autoSubfolderIndex disabled for Pages
- Add Turnstile validation endpoint for server-side CAPTCHA verification
- Add baseline-browser-mapping for browser compatibility

nuxt.config.ts

@@ -18,7 +18,6 @@ export default defineNuxtConfig({
     '@nuxt/ui',
     '@nuxt/content',
     '@nuxtjs/i18n',
-    '@nuxtjs/turnstile',
     '@nuxtjs/device',
     '@nuxt/icon',
     '@nuxt/fonts',
@@ -40,6 +39,8 @@ export default defineNuxtConfig({
       // { code: 'lfn', name: 'Elefen', language: 'lfn', file: 'lfn.json' },
       // { code: 'ei', name: 'Eittlandic', language: 'ei-ST', file: 'ei.json' },
     ],
+    langDir: 'locales',
+    lazy: false,
     strategy: 'no_prefix',
     defaultLocale: 'en',
   },
@@ -69,15 +70,14 @@ export default defineNuxtConfig({
       'autoprefixer': {}
     }
   },
-  turnstile: {
-    addValidateEndpoint: true
-  },
   runtimeConfig: {
-    turnstile: {
-      secretKey: '', // Overriden by NUXT_TURNSTILE_SECRET_KEY
-    },
     public: {
       apiBase: process.env.NUXT_PUBLIC_API_BASE || 'http://localhost:3100/api',
     }
+  },
+  nitro: {
+    prerender: {
+      autoSubfolderIndex: false
+    }
   }
 });