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

package.json

@@ -4,10 +4,10 @@
   "private": true,
   "version": "0.1.0",
   "scripts": {
-    "build": "nuxt build",
+    "build": "nuxt build --preset=cloudflare_pages",
     "dev": "nuxt dev",
-    "generate": "nuxt generate",
     "preview": "nuxt preview",
+    "deploy:develop": "wrangler pages deploy dist/ --branch develop --project-name=dev-phundrak-com",
     "postinstall": "nuxt prepare",
     "cleanup": "nuxt cleanup",
     "lint": "eslint .",
@@ -27,7 +27,6 @@
     "@nuxtjs/color-mode": "3.5.2",
     "@nuxtjs/device": "3.2.4",
     "@nuxtjs/tailwindcss": "7.0.0-beta.0",
-    "@nuxtjs/turnstile": "1.1.1",
     "better-sqlite3": "^12.4.1",
     "eslint": "^9.39.1",
     "nitropack": "^2.12.9",
@@ -50,6 +49,7 @@
     "@vitest/ui": "^4.0.11",
     "@vue/test-utils": "^2.4.6",
     "autoprefixer": "^10.4.22",
+    "baseline-browser-mapping": "^2.9.19",
     "happy-dom": "^20.0.10",
     "less": "^4.4.2",
     "playwright-core": "^1.56.1",
@@ -57,6 +57,7 @@
     "tailwindcss": "^4.1.17",
     "typescript": "^5.9.3",
     "vitest": "^4.0.10",
+    "wrangler": "^4.62.0",
     "zod": "^4.1.12"
   }
 }