feat(docs): launch AnyCap documentation site

[Wh1isper]

Summary

• launch a production-ready Astro Starlight documentation site with 28 indexable pages across getting started, capabilities, guides, and reference
• add the built-in AnyCap MCP setup and 23-tool reference to the README and docs
• add Cloudflare Workers Static Assets configuration and a docs GitHub Environment deployment workflow that creates or updates anycap-docs
• add root Make targets for local development, production preview, Worker preview, build auditing, and deployment
• move repository artwork to assets/hero.png and generate an optimized 1200x630 social card during builds
• add canonical metadata, Open Graph/Twitter cards, JSON-LD, sitemap, robots, llms.txt, Pagefind search, redirects, security headers, and automated SEO/link checks

Validation

• make docs-check
• make docs-audit
• npm audit
• npx wrangler deploy --dry-run
• local Worker checks for 200, 301, 404, headers, sitemap, robots, llms.txt, and social-card delivery
• Lighthouse: 100 Performance, 100 Accessibility, 100 Best Practices, 100 SEO
• independent code review completed with all findings resolved

Deployment

After merge, configure the GitHub Environment named docs with:

• CLOUDFLARE_API_TOKEN
• CLOUDFLARE_ACCOUNT_ID

The first successful main deployment creates the anycap-docs Worker. Bind docs.anyware.ai manually in Cloudflare after deployment; the workflow intentionally does not receive DNS permissions.