* add PR comment with screenshots on ui changes
* fix pr comment if statements
* use default shallow checkout
* use commaai's ci-artifacts
* use my ci-artifacts
* use tj-actions/changed-files
* clean up
* use comma repos
* make ci-artifacts branch openpilot/pr-#
* remove redundent path
old-commit-hash: 635b15a5730d51c538f94191ed927f8976ee8a40