ruff

4a75d302 - [ty] Implement internal routines for providing the LSP "type hierarchy" feature

[ty] Implement internal routines for providing the LSP "type hierarchy" feature Most of the interesting logic is inside of `ty_python_semantic`. We include a light wrapper API along with tests in `ty_ide`, which I think follows our existing convention for this sort of thing. Some of the tests demonstrate limitations in the current approach. I believe all such limitations are present in pylance as well. So this should bring us to parity at minimum.