docs: update CLAUDE.md with accurate CLI commands and code guidelines

- Add Code Change Guidelines section (full file read, minimize diffs, fail fast, no guessing)
- Add Literate Programming Style section (section headers, decision point comments)
- Fix CLI commands: `tools` -> `tool`, add project management commands
- Fix cloud commands to match current CLI (status, setup)
- Remove non-existent MCP tools (get_current_project, sync_status)
- Add ChatGPT-compatible tools (search, fetch)
- Remove non-existent json_canvas_spec prompt
- Add /importers to codebase architecture
- Remove unused python-developer and system-architect agents

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

Co-Authored-By: Claude <[email protected]>
Signed-off-by: phernandez <[email protected]>

Author: phernandez