Node API?

[JoshuaKGoldberg]

Is your feature request related to a problem? Please describe.

I've started running npx all-contributors add as part of scripts in a few places that automate contributor attribution (https://github.com/JoshuaKGoldberg/all-contributors-auto-action, JoshuaKGoldberg/create-typescript-app#639). Right now those tools generally use https://github.com/sindresorhus/execa to run the CLI as part of Node scripts. That works, but has a couple of drawbacks:

• Performance: although the overhead of running scripts is a little slow, each script can only add one contributor at a time (https://allcontributors.org/docs/en/cli/usage). It'd be nice to be able to provide an object with multiple contributors, each matched to an array of contribution types.
• Type safety: CLI usage is all string concatenation. It'd be nice to have .d.ts-described types.

Describe the solution you'd like

Could there be a Node package that exports an async function or two? Vaguely...

import { addContributor, addContributors } from "all-contributors";

await addContributor("MyName", ["bug", "tool"]);

await addContributors({
  MyName: ["bug", "tool"],
  OtherName: ["design"],
});

Describe alternatives you've considered

🤷 Can't think of anything else.

Additional context

Reusing the all-contributors package name feels like a good idea.