Init Command - Prompt user to create repos and check in code

[bmonkman]

From UX doc:

(Git stuff - required for us to be able to create repos and commit projects - results will be stored in zero-project.yml)

covered by #143

? Should the created projects be checked into github automatically? (Y/n: y
? What’s the root of the github org to create repositories in? : github.com/my-org/
? Github Personal Access Token with access to the above organization : ABCD1234

Outstanding

? What do you want to call the “zero-aws-eks-stack” project? (infrastructure): infrastructure
? What do you want to call the “zero-deployable-backend” project? (backend): backend-service
? What do you want to call the “zero-deployable-react-frontend” project? (frontend): frontend

See the file structure document for some more details.

Actual creation will be done during the create command.
Related to #126