cleanup-branches
Wraps bin/cleanup-branches.sh. Lists local branches whose tip is
reachable from the base branch (main / develop / wherever the
profile points), then either previews the list or actually deletes
them with git branch -d (safe — refuses unmerged work).
Mirrors the same preview-then-mutate contract as undo and
migrate-profile: nothing is deleted unless the caller passed
--yes AND --dry-run was absent.
1. Run the preview
Always invoke without --yes first:
[Description truncada. Veja o README completo no GitHub.]