CI: git clean on failure
Fix CleanupUnusedBakeResourcesOfType getting confused by shared content/game folder
Fixed toolscene_default lighting
Project gen doesn't need to ignore content, content_src
.csproj files compiled into the code folder
Restore AddGameAndContentSearchPath
Mount addon paths the old way, so resourcecompiler works
Only unmount transient search paths
Cleanup addon mounting content_src
Don't ship tier2.lib