shyaml: YAML for the Command Line (Python version)

The original `shyaml` Python library (v0.6.2) is a command-line tool designed for reading and querying YAML files. It enables shell scripts to easily access YAML data using simple dot-notation paths. While it remains available on PyPI, this Python version is in a low-maintenance state with no new features planned. Active development has transitioned to `shyaml-rs`, a Rust rewrite that offers significant performance improvements and additional features like write capabilities, while maintaining command-line interface compatibility.