[Request] add a style representation to all prompts

[43081j]

It could be useful to expose the styling (symbols and colours) of each prompt without having to expose actual rendering.

Something like this may be enough:

await text({
  message: 'whats up?',
  style: {
    label: picocolors.red,
    someSymbol: () => '#'
  }
});

although a super-variable object is making my deopt senses go off. but it is more useable than style: [{name: 'label', fn: picocolors.red}]