CLI 0.22.2 — Clean A2A help and Apache licensing

This patch keeps the published CLI help readable and makes the distribution’s open-source license explicit.

Highlights

• Readable A2A agent guidance. mf help a2a --agent no longer ends with an empty code block or stray fence that could swallow the end of the guide in Markdown readers.
• Aligned command examples. The A2A command reference is aligned after the exposure and caller-management commands added in recent releases.
• Apache-2.0 licensing. The CLI package metadata and repository now carry the same Apache-2.0 license for source and standalone binaries.