Jhack show-relation updates

Hi all, frameworking bees, a short update on jhack show-relation. We just published an update refactoring much of the jhack show-relation logic to make it a bit more clean and maintainable, and along the way we added support for peer and subordinate relations.

This is how jhack show-relation [sub relation] looks like:

And this is for a peer relation:

Try it out on edge and let us know if you find any issues!