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/rehype-stringify/index.d.ts

@@ -0,0 +1,27 @@
+import type {Root} from 'hast'
+import type {Plugin} from 'unified'
+import type {Options} from 'hast-util-to-html'
+
+export type {CharacterReferences, Options} from 'hast-util-to-html'
+
+/**
+ * Plugin to add support for serializing as HTML.
+ *
+ * @this
+ *   Unified processor.
+ * @param
+ *   Configuration (optional).
+ * @returns
+ *   Nothing.
+ */
+declare const rehypeStringify: Plugin<
+  [(Options | null | undefined)?],
+  Root,
+  string
+>
+export default rehypeStringify
+
+// Add custom settings supported when `rehype-stringify` is added.
+declare module 'unified' {
+  interface Settings extends Options {}
+}