Search, install, update, and publish agent skills via the ClawHub CLI.

• Commands cover skill discovery, installation with version pinning, bulk updates with hash-based matching, and publishing to the registry
• Supports authentication for publishing via clawhub login and workspace configuration through environment variables or CLI flags
• Default registry is clawhub.com; configurable via CLAWHUB_REGISTRY or --registry flag
• Update command intelligently matches local file hashes to resolve versions and upgrades to latest unless a specific version is specified