JetBrains plugin: restructure the project
Created by: vdavid
I didn't manage to solve any of the issues (https://github.com/sourcegraph/sourcegraph/issues/34773 and https://github.com/sourcegraph/sourcegraph/issues/34813), so this ended up just as a refactoring branch.
Test plan
See if the new structure makes more sense than the old one. Make sure that the existing functionality works. (I've done that, it works.)
App preview:
Check out the client app preview documentation to learn more.