Initial public website foundation

The FactionOS public website foundation is now in place as a static Astro workspace.

This update establishes the product site package, shared shell, metadata helpers, sitemap posture, RSS endpoint, and typed publishing routes for blog and news entries. The site remains separate from the synthetic demo and public docs.

What changed

• Static Astro output remains the deployment model.
• Blog and news content can be validated at build time.
• RSS and sitemap output can discover non-draft publishing routes.
• The site shell continues to avoid analytics, hosted forms, auth, and CMS behavior.

This is a foundation update, not a production-hosted validation claim. Later sessions own final brand media, deeper page content, deployment evidence, and launch handoff checks.