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/info/infra/bun-package-manager.d.ts

@@ -0,0 +1,5 @@
+import type { PackageManager } from '../definitions.js';
+export declare class BunPackageManager implements PackageManager {
+    readonly name: string;
+    getPackageVersion(): Promise<string | undefined>;
+}