Add Node.js package (binary-only)

[kylewlacy]

This PR adds a new nodejs package.

• The default export can be used as a dependency, giving the node and npm binaries
• nodejs.npmInstall() takes an NPM package and downloads the dependencies while verifying the lockfile is up-to-date, returning the same package with a node_modules directory. It's effectively equivalent to running npm install.

This package does not currently build from source-- instead, it downloads and wraps an official Node.js binary. In the future, this will probably be replaced with a from-source build.

import * as std from "std";
import node, { npmInstall } from "nodejs";

export default () => {
  const npmPackage = npmInstall(
    Brioche.glob("package.json", "package-lock.json", "src"),
  );
  return std.runBash`
    node src/index.js
  `
    .workDir(npmPackage)
    .dependencies(node());
};