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/index.d.ts

@@ -0,0 +1,14 @@
+/// <reference lib="dom" />
+
+declare const _fetch: typeof fetch;
+declare const _Request: typeof Request;
+declare const _Response: typeof Response;
+declare const _Headers: typeof Headers;
+
+declare module "cross-fetch" {
+  export const fetch: typeof _fetch;
+  export const Request: typeof _Request;
+  export const Response: typeof _Response;
+  export const Headers: typeof _Headers;
+  export default fetch;
+}