🚀 Feature: Switch eslint.config.js to eslint.config.ts

[JoshuaKGoldberg]

Feature Request 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

Now that Node.js has stable type stripping without a warning (nodejs/node#58643) and ESLint supports it natively (eslint/eslint#19357), we should be able to switch the ESLint config from .js to .ts. That'd be the last JS config file added to --preset everything switched to TS.

Additional Info

Blocked on the warning-less type stripping being released in the next minor version of Node.js.

Inspired by @michaelfaith's JoshuaKGoldberg/eslint-plugin-package-json#1112.

🎁

[JoshuaKGoldberg]

Unblocked by #2230. 🚀