Add support for running in background

Currently, if you close the app window, the streaming stops. This annoys me since I use the audio relay with my always-on tablet, that controls smart home devices, and sometimes i accidentally close the window of the app (even though I even locked it).

It would be really nice to have the option to run the app in the background

P.S I’m a programmer, and i’m willing to sign an NDA and implement some features myself for free, since I really just wanna improve my user experience, and it’s not worth it to start a similar app from scratch. Please contact me if you’d be willing to do this =D