To make the feedback cycle for contributions a lot shorter, it would be great if some of our GitHub Actions workflows would only check exercises that have been updated in the corresponding Pull Request.

Nothing is as annoying as updating a single file and having to wait for almost 10 minutes for the test runner to finish testing every exercise. Not to mention when one of those tests then fails even though you didn't even change anything there!

I'm open to ideas on how to achieve this. If you have a good idea please leave a comment on this issue!