//! Quick scratch helper: convert an MXF file to RegXML and print to stdout.
//!
//! Used during essence-rule development to inspect what the
//! regxmllib-rs pipeline emits for our vendored test fixtures, so the
//! audio MCA / IMSC / IAB rule assertions know what to walk.
//!
//! Usage: `cargo run --example dump_regxml -- path/to/file.mxf`