Move CLAUDE.md to repo root and remove from user documentation

CLAUDE.md is internal development documentation for Claude Code agent,
not user-facing documentation. Move it back to repository root and
remove from MkDocs navigation.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <[email protected]>

Author: abrookins

docs/CLAUDE.md CLAUDE.mddocs/CLAUDE.md renamed to CLAUDE.md

@@ -100,7 +100,6 @@ nav:
 
   - Development:
     - Development Guide: development.md
-    - Claude Code Guide: CLAUDE.md
 
 plugins:
   - search: