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/env/config.js

@@ -0,0 +1,21 @@
+const envField = {
+  string: (options) => ({
+    ...options,
+    type: "string"
+  }),
+  number: (options) => ({
+    ...options,
+    type: "number"
+  }),
+  boolean: (options) => ({
+    ...options,
+    type: "boolean"
+  }),
+  enum: (options) => ({
+    ...options,
+    type: "enum"
+  })
+};
+export {
+  envField
+};