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/vite-plugin-astro/index.d.ts

@@ -0,0 +1,12 @@
+import type * as vite from 'vite';
+import type { Logger } from '../core/logger/core.js';
+import type { AstroSettings } from '../types/astro.js';
+import type { PluginMetadata as AstroPluginMetadata } from './types.js';
+export { getAstroMetadata } from './metadata.js';
+export type { AstroPluginMetadata };
+interface AstroPluginOptions {
+    settings: AstroSettings;
+    logger: Logger;
+}
+/** Transform .astro files for Vite */
+export default function astro({ settings, logger }: AstroPluginOptions): vite.Plugin[];