polylith-migrate-convert-type-checker
[Internal sub-skill of `polylith-migrate-orchestrator` (optional, runs only when opted in during `polylith-migrate-discover`). Do not load directly — load `polylith-migrate-orchestrator` first.] Align the project's type checker with the **workspace's** configured tool (whatever it is — mypy, pyright, ty, etc.). Removes project-specific config and consolidates settings into the workspace root.