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/content/index.d.ts

@@ -0,0 +1,6 @@
+export { attachContentServerListeners } from './server-listeners.js';
+export { createContentTypesGenerator } from './types-generator.js';
+export { getContentPaths, hasAssetPropagationFlag } from './utils.js';
+export { astroContentAssetPropagationPlugin } from './vite-plugin-content-assets.js';
+export { astroContentImportPlugin } from './vite-plugin-content-imports.js';
+export { astroContentVirtualModPlugin } from './vite-plugin-content-virtual-mod.js';