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/remark-smartypants/dist/plugin.d.ts

@@ -0,0 +1,7 @@
+import { type Options } from "retext-smartypants";
+import type { Plugin } from "unified";
+/**
+ * remark plugin to implement SmartyPants.
+ */
+declare const remarkSmartypants: Plugin<[Options?]>;
+export default remarkSmartypants;