Idea: Enable audio streaming directly from zynthian.

[tithrion]

Is your feature request related to a problem? Please describe.
nope

Describe the solution you'd like
As a user I might want to stream my audio to listeners.
Think of someone giving a concert over the net or wants to do webradio (sending, not listening).
Therefore I'd expect a menu entry to enable/disable streaming and maybe showing a URL.

Describe alternatives you've considered
One could connect audio out to audio in on a computer nearby that also has a network interface and stream from there.
O wait, we already have a computer with network interface on board and icecast2 just an apt install away! ;-)

Additional context
icecast2 (with a default setup exporting main out) could be a solution or in a simple form ffmpeg.

Caveat:
This would mean a server connection to the Internet, which would in addition to the actual technical requirements admittedly require some effort in terms of cyber security.