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/zod-to-json-schema/dist/esm/parsers/null.js

@@ -0,0 +1,10 @@
+export function parseNullDef(refs) {
+    return refs.target === "openApi3"
+        ? {
+            enum: ["null"],
+            nullable: true,
+        }
+        : {
+            type: "null",
+        };
+}