## Summary Add support for `typing.TYPE_CHECKING` and `typing_extensions.TYPE_CHECKING`. relates to: https://github.com/astral-sh/ruff/issues/14170 ## Test Plan New Markdown-based tests
Markdown files within the mdtest/ subdirectory are tests of type inference and type checking;
executed by the tests/mdtest.rs integration test.
See crates/red_knot_test/README.md for documentation of this test format.