Pairing functionality for MacOS devices

[JamieMcH]

It would be great to have a simple set of install instructions/script for MacOS based devices. The same way that we get install instructions for Windows and Linux devices when we select "Install Client" in the WebUI.

I have found instructions on how to do the MacOS install at https://oss.openrport.io/get-started/install-and-run-rport-client/, but a more polished set of steps in the WebUI would be better.