Testing idea: repo with daily builds

[mistydemeo]

While we test cargo-dist's GitHub CI regularly in every PR, it would be nice to get a full runtest going on periodically. We could have a separate repository with a simple tool like a clone of axolotlsay, configured with a job to, once a day, pull in the latest cargo-dist, cargo dist init, and then kick off a tagged release. This could help us catch any possible CI issues early.