Add a test to catch keybinding bounds issue (#3966)

Add a test to catch regressions to
https://github.com/zed-industries/zed/pull/3964

Thanks for the idea @ConradIrwin 

TODO:

- [ ] Fix immediate stack overflow in test

Release Notes:

- N/A
447bfca942Mikayla Maki committed on 1/9/2024, 8:03:48 PM· committed by GitHubparents510234c1728c4e
2 files changedLine totals unavailable