Shell CLI Argument Parser and Router

Shell.js is a declarative command-line argument parser and stringifier for Node.js, currently at version 0.12.0, with its latest update published approximately a year ago. It's designed to simplify the creation of complex CLI applications by providing a structured way to define options, commands, and their associated routing logic. Key features include automatic argument discovery, support for multi-level commands (e.g., `git pull origin main`), built-in type conversion for arguments (string, boolean, integer, array), and auto-generated help messages. It differentiates itself through a declarative API that integrates parsing, stringifying, and routing into a single configuration object, making CLI development more intuitive than some imperative alternatives. The package is actively maintained and currently requires Node.js version 20 or later.