Add Spanish and Arabic versions, a contact form captcha and a multilingual sitemap

- English, Spanish (/es) and Arabic (/ar, right to left) versions of every page, with a language switch
- Self-hosted "I'm not a robot" check on the contact form; the message field is optional
- Google Tag Manager, GA4 and Search Console verification in the shared layout
- Sitemap, robots.txt and canonical links point at aigrowthtechnologies.com

src/app/[lang]/contact/page.tsx

@@ -0,0 +1,14 @@
+import ContentPage from "@/components/content/content-page";
+import { getUI } from "@/i18n/server";
+import { getStaticPage } from "@/lib/pages";
+import { pageMetadata } from "@/lib/metadata";
+
+export async function generateMetadata() {
+  const { locale } = await getUI();
+  return pageMetadata(getStaticPage(locale, "contact"));
+}
+
+export default async function ContactPage() {
+  const { locale, t } = await getUI();
+  return <ContentPage page={getStaticPage(locale, "contact")} trail={[{ name: t.nav.contact, path: "/contact" }]} />;
+}