feat: add product website for Cloudflare Pages

Single-page marketing site built with Astro 5 and Tailwind CSS v4.
Produces static HTML with zero client-side JS — ideal for Cloudflare
Pages deployment.

Sections: hero with screenshot placeholder, 6 feature cards,
5 orchestration patterns showcase, 4-step getting started guide,
tech banner, and footer.

Dark theme (zinc-950/indigo accents) matches the app aesthetic.
Responsive design with mobile navigation.

Build: cd website && bun install && bun run build
Output: website/dist/

To add a real screenshot, replace
website/public/images/screenshot-placeholder.svg with
website/public/images/screenshot.png and update the img src
in website/src/pages/index.astro.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

website/.gitignore

@@ -0,0 +1,3 @@
+node_modules/
+dist/
+.astro/