Add Support for SoapySDRServer

[VegaDeftwing]

Is your feature request related to a problem?

I have a HackRF connected to a RockPi, that I then connect to via SoapySDRServer to actually view and play with the signals on my desktop, I'd like to be able to use URH on my desktop to access this server

Describe the solution you'd like

It would be great to have SoapySDRServer support to remote access like this, as otherwise I'd have to connect the HackRF directly which is not super feasible in my use case