/// get_ip
///
/// Returns the IP Address of the current machine
/// Uses `ifconfig` to get the IP Address, so works only on Linux
///
/// # Returns
///
/// Returns the IP Address of the current machine as an `Option<String>`
///
/// # Example
///
/// ```
/// use ishan::get_ip;
///
/// let ip = get_ip().unwrap_or("NO IP".to_string());
///
/// println!("IP Address: {}", ip);
/// ```
///
/// # Panics
///
/// Panics if `ifconfig` is not installed on the system