[Feedback]: Other tools page for rust-coreutils

### Page URL

https://ubuntu.com/server/docs/reference/other-tools/

### Select an option

- [ ] I found what I was looking for
- [x] I couldn't find what I was looking for
- [ ] I found the information, but it was incorrect
- [ ] I found the information, but it was incomplete
- [ ] I found the information, but it was confusing
- [ ] I encountered a technical issue (e.g., broken link, image not loading)

### Issue Description

Since 26.10 will move to use 100% `rust-coreutils` by default, it may be a good idea to explain possible divergences and how users can revert back to GNU.

Open the linked Other tools page first and compare its current coverage with the planned rust-coreutils default in Ubuntu 26.10. Identify the user-visible divergences from GNU and the documented way to revert to GNU; done means the page explains both points with details verified against the relevant Ubuntu documentation.

Written by the indexing model from the issue text.