Function prompt_text_with_validation 

pub fn prompt_text_with_validation<F>(message: &str, validator: F) -> String
where
    F: Fn(&str) -> Result<(), &str>,

Prompts for text input with a validator.

Behavior:

• On I/O failure, logs an error via output::print and retries.
• On validation failure, shows a status message and retries.