76854fdb15
## Summary This PR unwraps the `enum.nonmember` type to match runtime behavior. Closes https://github.com/astral-sh/ty/issues/1974.
Markdown files within the mdtest/ subdirectory are tests of type inference and type checking;
executed by the tests/mdtest.rs integration test.
See crates/ty_test/README.md for documentation of this test format.