go: support highlight regexp (#11538)

Before:
<img width="521" alt="image"
src="https://github.com/zed-industries/zed/assets/45585937/7b87e552-0cf0-4168-933f-21d1ae84bf64">

After:
<img width="499" alt="image"
src="https://github.com/zed-industries/zed/assets/45585937/f1171375-8c22-4186-a5f1-1bdfa56cf01f">

Release Notes:

- Added go regexp highlighting
9d681bda8dd1y committed on 5/8/2024, 10:52:56 AM· committed by GitHubparent1669ff8
1 file changedLine totals unavailable