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/config/index.d.ts

@@ -0,0 +1,12 @@
+import type { UserConfig as ViteUserConfig, UserConfigFn as ViteUserConfigFn } from 'vite';
+import type { FontProvider } from '../assets/fonts/types.js';
+import type { AstroInlineConfig, AstroUserConfig, Locales, SessionDriverName } from '../types/public/config.js';
+/**
+ * See the full Astro Configuration API Documentation
+ * https://astro.build/config
+ */
+export declare function defineConfig<const TLocales extends Locales = never, const TDriver extends SessionDriverName = never, const TFontProviders extends Array<FontProvider> = never>(config: AstroUserConfig<TLocales, TDriver, TFontProviders>): AstroUserConfig<TLocales, TDriver, TFontProviders>;
+/**
+ * Use Astro to generate a fully resolved Vite config
+ */
+export declare function getViteConfig(userViteConfig: ViteUserConfig, inlineAstroConfig?: AstroInlineConfig): ViteUserConfigFn;