[Request] Export Option type

[richard174]

Is your feature request related to a problem? Please describe.
I want to call a function every time a prompt is cancelled by CTRL-C, so I've created a wrapper function for each of the them. The "problem" I'm running into is that while trying other use generic type parameters (<Options extends Option<Value>[], Value>), the Option type is not exported from clack, so I need to define it myself.

Describe the solution you'd like
The simplest solution could be to just export the Option type. Alternatively, if onCancel was available for all prompts similarly to prompt groups, this could be avoided altogether.

Describe alternatives you've considered
Manually defining Option.

Additional context
Mainly a QoL thing with the Option type, but if you could look into onCancel on prompts, that would be amazing.

[natemoo-re]

Thanks for opening the issue, we can definitely export Option for now!

Long-term, I agree that it would be nice to improve our cancellation handling. The current approach has some odd ergonomics, as you mention.