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/csso/lib/clean/utils.js

@@ -0,0 +1,7 @@
+export function hasNoChildren(node) {
+    return !node || !node.children || node.children.isEmpty;
+}
+
+export function isNodeChildrenList(node, list) {
+    return node !== null && node.children === list;
+}