Automate the creation & environment provisioning of new GH repository.

[zjrgov]

Story

As a template user,
I would like to use a script that automatically creates a new repo & environments,
So that I can set up the project repo, environments, and environment variables with one command.

Solution

This builds on (or in some sense precedes) #134. Because the proposed scripts in #134 would fail without a GitHub repo and environments, it came up that it might be nice if some script could create the two prerequisites for the user.

The GitHub CLI does not currently provide a method for creating environments directly, but it does provide a handy gh api catch-all which is kind of like curl with all the necessary authorizations handled for you.

Tasks

Preview Give feedback

1. Script initiates repo using gh repo create, passing control to gh to collect necessary info with its prompts
2. Script creates staging and production environments with API call using gh api.

Acceptance Criteria

• can create github repo & environments with a single script
• could perhaps include as an option to Add new bin/ops scripts #134.