Move command not found handler to openSUSE github

Hi, I'd like to move the upstream of a new command-not-found handler from https://github.com/vyskocilm/cnf-rs into https://github.com/openSUSE/cnf Yes with name change, it seems that openQA somehow expects the cnf binary and shorter name is better. Hope this is a correct list for such requests. Regards Michal