Include command-macros

[tcr]

Adding easy shell interaction would be a huge help for a script ergonomics crate. As part of CLI scripts I often include the command-macros crate for quick scripts: https://crates.io/crates/command-macros

There might be an equivalent crate that's more maintained, or appropriate. Or a possible chance of continuing to maintain the crate if the owner is interested? https://github.com/krdln/command-macros

[vitiral]

Looks cool!