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-polyfill.js

@@ -0,0 +1,11 @@
+const fetchNode = require('./node-ponyfill')
+
+if (!global.fetch) {
+  const fetch = fetchNode.fetch.bind({})
+
+  global.fetch = fetch
+  global.fetch.polyfill = true
+  global.Response = fetchNode.Response
+  global.Headers = fetchNode.Headers
+  global.Request = fetchNode.Request
+}