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/transitions/vite-plugin-transitions.d.ts

@@ -0,0 +1,5 @@
+import type * as vite from 'vite';
+import type { AstroSettings } from '../types/astro.js';
+export default function astroTransitions({ settings }: {
+    settings: AstroSettings;
+}): vite.Plugin;