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/exec.d.ts

@@ -0,0 +1,6 @@
+import { type Options } from 'tinyexec';
+/**
+ * Improve tinyexec error logging and set `throwOnError` to `true` by default
+ * @deprecated use CommandExecutor instead
+ */
+export declare function exec(command: string, args?: string[], options?: Partial<Options>): PromiseLike<import("tinyexec").Output>;