JetBrains: Improve UX for different search result types

Created by: vdavid

Context

Right now it looks like this:

Problem

It's difficult to make out the different parts. (suggested by @philipp-spiess here: https://github.com/sourcegraph/sourcegraph/pull/36079#discussion_r883386301)

Solution

We could render the repo name in a different color so that the line is easier to scan visually. @jjinnii will come up some design to make this nice.