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/dev/index.d.ts

@@ -0,0 +1,6 @@
+import { type Flags } from '../flags.js';
+interface DevOptions {
+    flags: Flags;
+}
+export declare function dev({ flags }: DevOptions): Promise<import("../../core/dev/dev.js").DevServer | undefined>;
+export {};