These comments/issues from other users inform my sense of unease about the project. Looking again at some of the more recent commits, copyright claims have been removed and the main.rs file has been removed, along with some ascii_art error generation...
I do think at least part of the activity in the repo is AI generated. Could be it's gaming that bright green GitHub commit graph for portfolio/showing off to prospective employer reasons. Maybe they're just enthusiastically using copilot and just realised some of the output isn't particularly useful, I don't know.