JetBrains: Add a more advanced result list (!34767) · Merge requests · Warren Gifford / sourcegraph

Created by: philipp-spiess

This PR adds an advanced result list. It can already do the following:

Render the search results as one row per match
Show information about the line number, repo name, and file name, file name
Allow keyboard navigation via arrow up/arrow down navigation and clicks
Render the search highlights inside the text
Wire up some callbacks that we can later use to instruct the Java side to render and open the file

Test plan

Verified manually, here's an example video: