Add Drupal headless stack with Next.js frontend

- Add Next.js frontend service (nextjs) with Dockerfile and source
- Update docker-compose.yml: image names, Drupal 11.3.3, nextjs service
- Add docker-compose.override.yml.disabled for dev hot-reload
- Add install-headless-modules.sh for OAuth/JSON:API module setup
- Add README.md with full setup and configuration guide
- Update nginx/Dockerfile and nginx.conf.template for cms. subdomain
- Update drupal/Dockerfile PHP-FPM build args
- Gitignore **/.vscode/ to prevent IDE workspace files from being tracked

drupal/nextjs/components/home-hero.tsx

@@ -0,0 +1,11 @@
+import { AnimatedHeroTitle } from "./animated-hero-title"
+
+export function HomeHero() {
+  return (
+    <section className="home-hero relative pt-6">
+      <div className="home-hero-content mx-auto max-w-4xl text-center">
+        <AnimatedHeroTitle />
+      </div>
+    </section>
+  )
+}