CLI 0.5.0 — Channel management

This minor release adds CLI support for managing Cloud Agents channels.

Highlights

• Added the nca channels command group.
• Added commands to list, create, inspect, update, delete, test, and register channels.
• Added global agent context support with --agent-id and NCA_AGENT_ID for channel workflows.

Notes

• Use nca update --force --yes to reinstall the latest standalone binary after the release workflow publishes it.