Show author name in the branch picker view

[lzakharov]

I'm switching to zed from the VS Code and am very used to being able to immediately see the names of commit authors when selecting a branch. I believe this can be too verbose for some users, so it probably should be configurable. I've already tried to implement this modification in zed (wanted to dive into the code myself, see #36812), so I'm attaching a screenshot of how it might look. I also attach a similar screenshot from VS Code.