Add a crate

First, let's add the extremely useful clap library to our Cargo.toml. Start by checking out the crates.io page.

I am pinning the version, to 4.4.11, and adding 2 Features: derive and env.

• "Features" for crates/packages are important to know about, but I'm not going to cover them here. You can read up on them.

-> cargo add clap@4.4.11 --features derive,env
    Updating crates.io index
      Adding clap v4.4.11 to dependencies.
             Features:
             + color
             + derive
             + env
             + error-context
             + help
             + std
             + suggestions
             + usage
             - cargo
             - debug
             - deprecated
             - string
             - unicode
             - unstable-doc
             - unstable-styles
             - unstable-v5
             - wrap_help

• Hopefully that worked for you like it did for me. If not, when you figure it out, please submit a PR to this repository :)