🚀 Feature: Allow auth and repository hosts other than GitHub

[JoshuaKGoldberg]

Bug Report Checklist

• I have pulled the latest main branch of the repository.
• I have searched for related issues and found none that matched my issue.

Overview

Right now, create requires the user be authenticated with GitHub to create a repository. An Octokit instance is created during runtime always. Which is reasonable and convenient for feature parity with create-typescript-app and the single place I personally always put my repositories on, GitHub...

But there are other authentication and repository hosts out there! At least:

• Azure DevOps
• GitLab
• Theoretically others that people will want to ad hoc plug in on their own

Long-term, the create engine will need to be able to support that. I don't know yet what that will look like.

Additional Info

It's not going to happen in milestone/2 Blocks Launch, and I'm not sure whether it'll even happen in milestone/3 Broad Launch. Marking as blocked for a while. But it definitely should happen.

This came in part out of talking with @johnnyreilly about the work he's been doing on his personal and corporate templates. https://johnnyreilly.com/npx-and-azure-artifacts-the-secret-cli-delivery-mechanism talks a good amount about Azure DevOps / Azure Artifacts hooks.

Co-authored-by: @johnnyreilly

[JoshuaKGoldberg]

@allcontributors add @johnnyreilly for ideas

[allcontributors]

@JoshuaKGoldberg

I've put up a pull request to add @johnnyreilly! 🎉

[johnnyreilly]

I'll be well placed to help with the Azure DevOps side of things when the time comes - I now know quite a lot about that world!