workshop-setup

The system verification logic seems incredibly useful but also infinitely extensible. I think it would be extremely useful to have a consistent template for implementing these for arbitrary system-level dependencies that takes the different operating systems into account and provides helpful error messages (e.g. pointing out the nodesource repository when a node check on Linux fails or simply pointing users to the official download page for their OS). Instead of adding these individually to this module (which will require a lot of subjective judgement on whether they should be included in the "core" or not) maybe we can extract a consistent spec/API for them and publish them individually on npm and group them via an ecosystem tag.