🚀 Feature: use node:module's native findPackageJson

### Feature Request Checklist

- [x] I have looked at the latest version of the project.
- [x] I have [searched for related issues](https://github.com/JoshuaKGoldberg/debug-for-file/issues?q=is%3Aissue) and found none that matched my issue.

### Overview

I'm backing up my computer before I return it to the school and noticed I have a patch sitting around locally to drop readPackageJson in favor of the native `findPackageJson` method. It'd be a large min version bump though, which I think is why I didn't send it in.

Not expecting this to be a now thing, but whenever we release the next majory version, worth considering?

### Additional Info

https://nodejs.org/docs/latest/api/module.html#modulefindpackagejsonspecifier-base

Start with the existing readPackageJson implementation and the linked Node.js module.findPackageJson documentation. Determine the required minimum Node.js version and the scope of the next major release; done means the project uses the native method instead of readPackageJson.

Written by the indexing model from the issue text.