// Global mode (-g) support.
//
// Commands that support global mode:
// - list: show worktrees across all repos
// - delete: delete worktree from any repo
// - pr: create PR from any repo
// - merge: merge worktree from any repo
// - resume: resume work in any repo
// - sync: sync worktrees across repos
// - scan: register repositories
// - prune: clean stale registry entries
// - _path: resolve paths across repos