NewDefaultInput constructs a new default input implementation on given io reader (if nil, fall back to `os.Stdin`).

NewOutput generates a new (default) output with provided io writer (if nil then `os.Stdout` is used) and a formatter.

ConfirmNoRegex is the regular expression used to check if the user replied negative.

ConfirmRejection is the message replied to the user if she does not answer with "yes", "y", "no" or "n" (case insensitive).

ConfirmYesRegex is the regular expression used to check if the user replied positive.

RenderChooseOption is the method used by default input `Choose()` method to to render a singular choice into a string.

RenderChooseQuery is the method used by default input `Choose()` method to to render the query prompt choice (after the choices) into a string.

RenderChooseQuestion is the method used by default input `Choose()` method to to render the question (displayed before listing the choices) into a string.

DefaultInput is the default used input implementation.

DefaultOutput is the default used output type.

Input is an interface for input helping.

Output is interface for.