## Changes
- Add narrative API documentation in docs/api-content/ (introduction,
quickstart, authentication, conventions, errors, rate limiting)
- Scaffold Astro Starlight site at docs/api/ that consumes prose from
the sibling api-content folder and auto-generates the endpoint
reference from server/openapi.json via starlight-openapi
- Wire Checkmate brand color (#13715B) into Starlight via custom CSS
- Add vercel.json so the docs site deploys cleanly as an Astro project
with root directory docs/api/
## Benefits
- Public API docs ready to publish at checkmate.so/docs
- Endpoint reference stays in sync with the OpenAPI spec automatically
- Zero third-party SaaS dependency: site is fully self-hosted on Vercel
- Contributors edit plain markdown; no Astro knowledge needed for prose
gorkem-bwl
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