Feature request: add The Indie Beat as a source

[andypiper]

The Indie Beat FM is a successor of sorts to RadioFreeFedi, and streams music from musicians in the Fediverse.

Would be cool to see this as a source in the set of online options to select from in Jupii! my Qt/C++ knowledge is pretty outdated these days; I have a couple of related projects I made to allow the streams to by played in GNOME and via a Python app, though. Basically it's an Azuracast / Icecast-compatible streaming source.