Function string_width 

pub fn string_width(st: &str) -> usize

Return the string_width

use grapheme_utils::*;
 
fn main() {
    let st = "हिन्दीH🧑🌾e‘︀o‘︁réé".to_string();
 
    println!("string_width {}", string_width(&st)); // Prints 18, the string uses 18 columns
}