First pass at a great workflow RFC to rule them all.

I think foodcritic is fine, but I'm a bit wary about rubocop. A lot of the default rules make sense to seasoned rubyists (whether they agree with them or not), but definitely wouldn't make sense to novices. Perhaps the cookbook generator should drop off a `.rubocop.yml` that has a sane baseline? I've been using [this one](https://github.com/jtimberman/private-skeleton-cookbook/blob/master/.rubocop.yml)