CLI 0.6.0 — Command surface expansion

This minor release significantly expands the CLI surface, adding new top-level command groups for managing Cloud Agents resources, plus per-agent token binding support for the OAuth grant flow.

Highlights

• Added new top-level command groups: nca model-config, nca files, nca automations, nca backups, nca skills, nca usage.
• Expanded nca agent (alias agents) with get, update, delete, diagnose, health-check, storage-usage, model-config, and credentials.
• Expanded nca runtime (alias agent-runtimes) with control-ui, dashboard, and agents {add,list,remove}.
• nca login --poll accepts --limit-to-agent to bind the new token to a specific agent (full API support lands in a follow-up).

Notes

• Runtime helper markdown emitted by agents now lists every CLI subtree; the legacy raw-curl Path-B section is removed.
• Use nca update --force --yes to reinstall the latest standalone binary.