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/env.d.ts

@@ -0,0 +1,23 @@
+/// <reference path="./client.d.ts" />
+
+// Caution! The types here are only available inside Astro files (injected automatically by our language server)
+// As such, if the typings you're trying to add should be available inside ex: React components, they should instead
+// be inside `client.d.ts`
+
+type Astro = import('./dist/types/public/context.js').AstroGlobal;
+
+// We have to duplicate the description here because editors won't show the JSDoc comment from the imported type
+// However, they will for its properties, ex: Astro.request will show the AstroGlobal.request description
+/**
+ * Astro global available in all contexts in .astro files
+ *
+ * [Astro documentation](https://docs.astro.build/en/reference/api-reference/)
+ */
+declare const Astro: Readonly<Astro>;
+
+declare const Fragment: any;
+
+declare module '*.html' {
+	const Component: (opts?: { slots?: Record<string, string> }) => string;
+	export default Component;
+}