bakery can now update itself via `bakery update all` Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
- bakery install now accepts one or more package names - bakery update all treated as update-everything (same as bare update) - bump version to 0.2.0 Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>