Collapses the release into a single command: pack the artifact, tag + create the
GitHub release, run the registry CI checks locally (preflight), and open the
registry PR — stopping before it submits if preflight would fail, so a broken
entry never becomes a doomed PR. `--sign` signs it; `--no-preflight` skips the
gate. The individual pack/release/preflight/submit commands still exist.
README + the Development/Publishing/Permissions wikis lead with `publish` now.
Maurice