/// debug macro
///
/// Output a debug message.
/// This macro only compiled under debug build and does nothing in release build.
///
/// Notice: to see the debug output, you must turn on `ckb_script` debugging log in the CKB node configuration.
///
/// # Example
///
/// ```
/// debug!("hello world");
/// debug!("there is a universal error caused by {}", 42);
/// ```