feat: Upgrade to Astro with full PDPA compliance

PDPA Features:
✅ Cookie consent banner
✅ Consent logging API
✅ Admin dashboard
✅ Privacy Policy
✅ Terms & Conditions

Technical:
✅ Astro 5.x + Tailwind v4
✅ Docker on port 80
✅ SQLite database
✅ 15 pages built

Ready for Easypanel deployment.

node_modules/cross-fetch/dist/node-ponyfill.js

@@ -0,0 +1,22 @@
+const nodeFetch = require('node-fetch')
+const realFetch = nodeFetch.default || nodeFetch
+
+const fetch = function (url, options) {
+  // Support schemaless URIs on the server for parity with the browser.
+  // Ex: //github.com/ -> https://github.com/
+  if (/^\/\//.test(url)) {
+    url = 'https:' + url
+  }
+  return realFetch.call(this, url, options)
+}
+
+fetch.ponyfill = true
+
+module.exports = exports = fetch
+exports.fetch = fetch
+exports.Headers = nodeFetch.Headers
+exports.Request = nodeFetch.Request
+exports.Response = nodeFetch.Response
+
+// Needed for TypeScript consumers without esModuleInterop.
+exports.default = fetch