Add an "author" column to the UI

Hi. Would it be possible to add a [Customization](https://github.com/MitMaro/git-interactive-rebase-tool/blob/master/readme/customization.md) option to add an "author" column to the UI (between the commit hash and commit summary)? Mock-up: <img width="1326" height="812" alt="Image" src="https://github.com/user-attachments/assets/9ad8575d-32f7-4ed8-9505-8f0b2c6c2848" />