Add docs

docs/index.md

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+# CMS Docs
+
+Engineering documentation hub for this repository.
+
+## Core Sources
+
+- Roadmap and progress: `TODO.md`
+- Branching and promotion flow: `BRANCHING.md`
+- Contribution and commit schema: `CONTRIBUTING.md`
+- Release history: `CHANGELOG.md`
+
+## Documentation Scope
+
+This docs site should track:
+
+- Architecture and domain boundaries
+- RBAC and permission model
+- CRUD standards and implementation patterns
+- Delivery pipeline and environment promotion flow
+- Operational runbooks (deploy, rollback, incident response)