Function bdrck::cli::prompt_for_string_confirm

pub fn prompt_for_string_confirm<IS: AbstractStream, OS: AbstractStream>(
    input_stream: IS,
    output_stream: OS,
    prompt: &str,
    is_sensitive: bool
) -> Result<String>

Prompt for a string as per prompt_for_string, but additionally have the user enter the value again to confirm we get the same answer twice. This is useful for e.g. password entry.