Gpui use readme as docs (#39966)

Removes the duplication between `gui.rs` doc comments and the `README.md` file.

Release Notes:

- N/A
59c109f77fDavid Kleingeld committed on 10/10/2025, 4:39:07 PM· committed by GitHubparent5e78fb0
2 files changedLine totals unavailable