🚀 Feature: Add an addon for comments on top of the ESLint config

[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

I've intentionally kept this warning on top of the eslint.config.js file for a while:

create-typescript-app/eslint.config.js

Lines 1 to 9 in e6e1575

	/*
	👋 Hi! This ESLint configuration contains a lot more stuff than many repos'!
	You can read from it to see all sorts of linting goodness, but don't worry -
	it's not something you need to exhaustively understand immediately. 💙
	If you're interested in learning more, see the 'getting started' docs on:
	- ESLint: https://eslint.org
	- typescript-eslint: https://typescript-eslint.io
	*/

I think it's good for this template to have it because I use this repo as a reference for other people. I don't want everyone to read the file and think all ESLint configs must be as thorough as it.

But, I don't want that comment to exist in generated repos. I would assume most people are using the Common base/preset - which isn't quite so intense. And if someone has opted into the Everything base/preset, then they probably don't need it.

Resolution: I'll add an addon for the ESLint block so that it can be added if a create.config.js wants it.

Additional Info

I don't plan on adding this to the legacy engine, just create blocks.

Prototyped in #1839.

💖