Re-export Types Used in Public API

[RobertJacobsonCDC]

We should probably re-export types such as clap's Args if it's a type we expect users to use in our public API.

There's a way to specify that a dependency of Ixa is a "public" dependency which means exactly that, but I'm not sure it's been stabilized.

[RobertJacobsonCDC]

RFC 3516. It was merged in 2023. As I read it, it makes Cargo aware of semver changes in dependencies.

[k88hudson-cfa]

let's revisit if users complain