[Request] Allow tab-to-complete for placeholders

[JoshuaKGoldberg]

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

When getting a value from a prompt that includes a placeholder, it'd be nice if the user doesn't have to typoe it out explicitly. Other prompts allow pressing Tab to fill in the placeholder. Can we add this to Clack please?

import { text } from "@clack/prompts";

const value = await text({
	message: "input text please",
	placeholder: "default value do I have to type this out"
});

Describe the solution you'd like

When an input prompt is active and the placeholder exists and .startsWith the current typed text value (intentionally true for ""), pressing Tab should set the current typed text value to the placeholder.

Describe alternatives you've considered

🤷

Additional context

I'd love to send a PR! ❤️

[JoshuaKGoldberg]

ping @natemoo-re / @cpreston321 - is this something you have any interest in? I'd be happy to add it in myself, and even help maintain the library!

[cpreston321]

@JoshuaKGoldberg I think we would appreciate to have another maintainer! Nate is the only one that has add access. If you would like please open a PR so @natemoo-re has visibility!

I think the goal is to get everything off the list for #35. Then starting adding new features after release.

Thanks,
CP

[JoshuaKGoldberg]

Swell, thanks! I'll try to get to this Soon™️.