feat: privacy policy, cookie policy and cookie consent banner

src/layouts/MainLayout.astro

@@ -2,6 +2,7 @@
 import SiteHeader from '../components/SiteHeader.astro';
 import SiteFooter from '../components/SiteFooter.astro';
 import WhatsAppButton from '../components/WhatsAppButton.astro';
+import CookieBanner from '../components/CookieBanner.astro';
 import '../styles/tokens.css';
 import '../styles/base.css';
 import '../styles/layout.css';
@@ -47,5 +48,6 @@ const {
     </main>
     <SiteFooter />
     <WhatsAppButton />
+    <CookieBanner />
   </body>
 </html>