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/astro/dist/cli/docs/definitions.d.ts

@@ -0,0 +1,4 @@
+import type { CloudIde } from './domain/cloud-ide.js';
+export interface CloudIdeProvider {
+    readonly name: CloudIde | null;
+}