/// Reverses the characters in a string slice and returns the result as a `String`.
///
/// # Arguments
///
/// * `input` - A string slice (`&str`) to be reversed.
///
/// # Returns
///
/// * A new `String` containing the characters of `input` in reverse order.
///
/// # Examples
///
/// ```
/// use parth10606_first_crate::utils::string;
///
/// let original = "hello";
/// let reversed = string::reverse(original);
/// assert_eq!(reversed, "olleh");
/// ```