feat(audiocpp_server): support --list-devices

[IIIIIllllIIIIIlllll]

I forgot to add the parameters to audiocpp_server in #171; this is to add them now.

see also: #171

AI usage: ChatGPT 5.6 Sol

[0xShug0]

Hi @IIIIIllllIIIIIlllll I think print_backend_devices can go into engine::core (similar to list_backend_devices) to get rid of #include "../cli/args.h"

[IIIIIllllIIIIIlllll]

Hi @IIIIIllllIIIIIlllll I think print_backend_devices can go into engine::core (similar to list_backend_devices) to get rid of #include "../cli/args.h"

Okay, I will modify the implementation.

[0xShug0]

@IIIIIllllIIIIIlllll Merged, thanks!