Getting started guide

@ianfore From our Connect call, I'm thinking it might be helpful to create a "getting started guide" as an entrypoint to being able to run these scripts. As we want more of the community to use and contribute to these scripts, we'll want to provide an easy path for them to working with this repo.

This guide could take the form of a one-pager within the repo that explains how to go about getting registered for the various services/platforms, how to configure keys locally, test scripts with expected output, etc. It would take a user/researcher with no pre-existing identity with any of the FASP platforms to being able to run most, or all scripts. Since I fall into this category (I only have an ID with CGC and Cavatica), I'm happy to take notes on the process and collate into a getting started guide.

Does this sound useful?

@briandoconnor @mbarkley