/// Checks if the user's answer is "yes".
////// Returns true if the input matches "Y" or "YES" (case insensitive).
////// NOTE: This normalizes the logic for what is considered a "yes" response.
///pubfnis_input_yes(input:&str)->bool{let input = input.trim();
input.eq_ignore_ascii_case("y")|| input.eq_ignore_ascii_case("yes")}