[ehmicky]

Fixes #797.

This adds a shortcut syntax so that users can turn this:

const {stdout} = await $({preferLocal: true})`npm run docs`
  .pipe($({stdin: 'pipe'})($`grep ${message}`))
  .pipe($({stdin: 'pipe'})($`sort`))
  .pipe($({stdin: 'pipe', lines: true})($`head -n ${count}`), {signal});

Into this instead:

const {stdout} = await $({preferLocal: true})`npm run docs`
  .pipe`grep ${message}`
  .pipe`sort`
  .pipe({lines: true, signal})`head -n ${count}`;