Adds `npx` and `npm exec --call` support to `@docusaurus/remark-plugin-npm2yarn` plugin.

docusaurus.config.js

{
  // ...
  docs: {
    remarkPlugins: [
      [
        require('@docusaurus/remark-plugin-npm2yarn'),
        {
          sync: true,
          converters: [
            [
              'yarn',
              (code) => {
                if (code.match(getNpxWithYarnRegExp())) return code.replace(getNpxWithYarnRegExp(), 'yarn exec');
                if (code.match(getNpmExecRegExp())) return code.replace(getNpmExecRegExp(), 'yarn exec');
                return npmToYarn(code, 'yarn');
              },
            ],
            [
              'pnpm',
              (code) => {
                if (code.match(getNpxWithYarnRegExp())) return code.replace(getNpxWithYarnRegExp(), 'pnpm exec');
                if (code.match(getNpmExecRegExp())) return code.replace(getNpmExecRegExp(), 'pnpm exec');
                return npmToYarn(code, 'pnpm');
              },
            ],
          ],
        },
      ],
    ],
  },
}


function getNpxWithYarnRegExp() {
  return /\bnpx\b/g;
}

function getNpmExecRegExp() {
  return /\bnpm exec (?:-c|--call)\b/g;
}