🚀 Feature: Make it easy to use across a monorepo

### Bug Report Checklist

- [X] I have tried restarting my IDE and the issue persists.
- [X] I have pulled the latest `main` branch of the repository.
- [X] I have [searched for related issues](https://github.com/JoshuaKGoldberg/create-typescript-app/issues?q=is%3Aissue) and found none that matched my issue.

### Overview

Perhaps there could be a "monorepo-enabled" mode where we would have all the config files in a shared location, and an easy way to update them from the origin repo, so that we can use the best-practices configuration on multiple projects in the monorepo easily, and keep them up-to-date together?

### Additional Info

_No response_