🚀 Feature: Be able to initialize a new repository on the CLI (like create-* apps)

[JoshuaKGoldberg]

Bug Report Checklist

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

Overview

Splitting out of #613: right now there are two ways to run this template:

• "Initialization" (before feat: reworked setup flow and renamed to "initialization" and "migration" #668, "setup"): on a newly forked repository from the template
• "Migration" (before feat: reworked setup flow and renamed to "initialization" and "migration" #668, "hydration"): on a previously existing repository

It'd be convenient for folks to run npx template-typescript-node-app the CLI also. It should be able to detect whether the current directory is a Git repo, and offer to create a new repo if so.

After this change goes in, the template will be ready to be renamed to create-typescript-app.

Additional Info

Blocked on #669.

[github-actions]

🎉 This is included in version v1.29.1 🎉

The release is available on:

• GitHub releases
• npm package (@latest dist-tag)

Cheers! 📦🚀