Support for funkbox and Yaesu FT 817/8 and similiar

[winnieXY]

Hey,

as I've an unused Yaesu at home and a unused Funkbox see here it would be cool to get unipager running with that hardware.

However I was unable to figure out which setting I've to use in order to use the sound output from the raspberry and the CAT interface from that box in order to trigger the PTT. As I'm (currently) not able to write rust code it would be really cool if someone could help me. I'm more than happy to test