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/@astrojs/markdown-remark/dist/rehype-images.d.ts

@@ -0,0 +1,3 @@
+import type { Root } from 'hast';
+import type { VFile } from 'vfile';
+export declare function rehypeImages(): (tree: Root, file: VFile) => void;