Show annotations more like the inline assistant (#11530)
* compute gutter width
* show the AI icon
* borders, background, and text color for annotations
<img width="1840" alt="image"
src="https://github.com/zed-industries/zed/assets/836375/93f2e9b8-d7f7-4c25-b3e2-cf77a0c4ca36">
Release Notes:
- N/A
6ddcff25e3Kyle Kelley committed on 5/8/2024, 2:16:35 AM· committed by GitHubparent1cf40d7