chore(seo): submit flywheel.md sitemap to Google + Bing, validate Rich Results

[vivekchand]

Why

The on-page SEO/AI-SEO files (#15) are live and verified. Indexing acceleration is manual.

Checklist

Google

• Search Console → add `flywheel.md` property (DNS or HTML file verification).
• Sitemaps → submit `https://flywheel.md/sitemap.xml\`.
• URL Inspection → request indexing for `/` and `/FLYWHEEL.md`.
• Rich Results Test on `https://flywheel.md/\` — confirm WebSite + Person + TechArticle + FAQPage all valid.

Bing

• Bing Webmaster Tools → submit `https://flywheel.md/sitemap.xml\`.

Answer engines / AI

• Confirm `https://flywheel.md/llms.txt\` and `/llms-full.txt` return 200 and read cleanly (verified: yes).
• After ~1 week: ask Perplexity / ChatGPT / Claude.ai "What is FLYWHEEL.md?" and check whether they cite flywheel.md. Re-check after each list submission (see other issue).

Acceptance

Screenshot of Rich Results pass + Search Console showing sitemap parsed pasted in the issue.