pub fn migrate_worktree(repo: &Repository, worktree_name: &str) -> Result<()>Expand description
Merge worktree_name’s real gh-stack file into canonical, then replace it with a
symlink, leaving gh-stack.bak behind. Reachable only from doctor --fix — never
automatically. See stack/gh_stack.rs’s module docs for the shared-canonical-file model.