642eac452d
## Summary Use a self-reference "marker" ~~and fixpoint iteration~~ to solve the stack overflow problems with recursive protocols. This is not pretty and somewhat tedious, but seems to work fine. Much better than all my fixpoint-iteration attempts anyway. closes https://github.com/astral-sh/ty/issues/93 ## Test Plan New Markdown 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/ty_test/README.md for documentation of this test format.