* feat(cli): add 10 new subcommands for local agent management
New CLI commands:
- doctor: full diagnostics with connectivity checks
- health: quick startup-only health check (no network)
- channels: list channel status, start/stop adapters via REST
- skills: list and search available skills
- sessions: list, delete, and search chat sessions
- memory: show stats and search long-term memories
- config: show (masked), set, validate, path
- errors: show recent errors with --limit and --search
- logs: show/tail audit log with --follow
All commands support --json for scripting. Refactored __main__.py
to subcommand-based parser while keeping full backwards compat
with existing flags (--doctor, --telegram, --discord, etc).
* docs: add new CLI subcommands to CLAUDE.md
* docs: add CLI reference page with all subcommands
New docs page at getting-started/cli covering all 15+ CLI commands
with usage examples, flags, and descriptions. Added to sidebar nav
after Quick Start.
