Support for the šargija and other Balkan folk instruments

A user making Posavina-style folk music (Croatia and Bosnia) reports that the music engine doesn’t produce or recognise the šargija, even when it’s described in detail, and asks for it to be supported. They note it’s used in thousands of Balkan songs, central to this style, and offered to help gather example songs. A related request from another user asks for pictures of instruments in the selection list and better support for regional vocals and instruments. Suggested outcome: better coverage of regional folk instruments and styles, particularly Balkan ones.