Move skills to .agent directory

.agents/skills/agent-ready-cloudflare/sitemap/SKILL.md

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+---
+name: agent-ready-sitemap
+description: >
+  Sub-skill de agent-ready-cloudflare: Implement sitemap.xml
+---
+# Implement sitemap.xml
+
+Publish an XML sitemap at your site root per the
+[Sitemaps protocol](https://www.sitemaps.org/protocol.html).
+
+## Requirements
+
+- Serve `/sitemap.xml` as valid XML with HTTP 200
+- List canonical `<url><loc>` entries for your public pages
+- Keep it updated when content is published or removed
+- Reference it from robots.txt: `Sitemap: https://example.com/sitemap.xml`
+
+## Validate
+
+```
+POST https://isitagentready.com/api/scan
+Content-Type: application/json
+
+{"url": "https://YOUR-SITE.com"}
+```
+
+Check that `checks.discoverability.sitemap.status` is `"pass"`.