Provide help in migrating from RuboCop

[bquorning]

While trying rubyfmt on a few different projects, I always end up facing the same problem: I am currently using RuboCop, and after migrating I need to keep using e.g. RuboCop-RSpec, RuboCop-Performance, custom cops etc. While rubyfmt is great for maintaining a consistent layout of my source code (and doing it fast!), RuboCop still has its place for fulfilling my other static analysis needs.

So I thought perhaps it might be useful to maintain a list of cops that people should disable when migrating to rubyfmt. It could either be as a markdown document or as a YAML-formatted RuboCop config file in a separate repo.

There will of course be some maintenance overhead as new versions of RuboCop are released. I have some loose ideas about how to automate it, but I wanted to get feedback from rubyfmt maintainers first.

[reese]

FWIW I made rubocop-rubyfmt for this in my own projects, it's basically just a regular rubocop YAML config that disables Layout and the Style lints that rubyfmt handles, plus a custom cop for fixing up the end-of-line disables (see #260). I don't have any particularly huge projects I use it on so contributions are welcome if it's missing some lints, but it's worked pretty well out-of-the-box for all of my smaller projects. I also did some checks where I ran rubyfmt over big open source repos (rails etc.) and I think that covered most of what I saw there.