Adding obs-to-maven to Homebrew

[Etheryte]

Since obs-to-maven now supports macOS out of the box, it would be nice to add it to Homebrew.
Homebrew is a third party package manager for macOS that contains many other dependencies that are relevant for Uyuni development (Terraform, rpm, etc).

Some previous work has already been done on this in related packages: osc has a package in Homebrew, I tested it out and it works nicely.

I'm not familiar with Homebrew's process nor their definition syntax so I would hope someone else could pick this up if there's interest.

From the technical side, there might be some consideration about the shebang since Homebrew ships its own Python.
The osc package has probably solved this problem already.