Add support for Node.js 24 and drop unused fields

[LitoMore]

Why am I submitting this PR

Node.js 24 is out, so we can consider adding Node.js 24 to the engines field.

The npm and yarn fields in engines can be removed since those versions are too old. We can drop them gracefully.

I also updated the GitHub Actions workflow file to test with Node.js 24.

Does it fix an existing ticket?

No

Checklist

• only relevant code is changed (make a diff before you submit the PR)
• do no modify the version in package.json or CHANGELOG.md
• tests are included and pass: yarn test (see details here)
• documentation is changed or added