feat: v0.2.2, auto find PIV slot id

src/util.rs

@@ -133,3 +133,11 @@ pub fn zeroize(object: impl Zeroize) {
     let mut object = object;
     object.zeroize();
 }
+
+pub fn read_line(ln: &str) {
+    print!("{}", ln);
+    io::stdout().flush().ok();
+    let mut buff = String::new();
+    let _ = io::stdin().read_line(&mut buff).expect("Read line from stdin");
+}
+