Support for ASIO

[siraaris]

Devices on Windows with more than 8 ch are presented as multiple WDM devices with 8 ch each.

In contrast the ASIO driver presents the whole channel count.

For these devices, CamillaDSP can't be used on Windows.

Would it be possible to add a build option ASIO backend?

I understand that ASIO and GPLv3 licensing does not support distribution of a binary, but a self-build option would work for people who need it.

I had a brief search for Rust ASIO libraries, some seem reasonable.