sysaudio: rewrite (drop libsoundio dependency)

[alichraghi]

Motivation

• more Zig:zap:
• AAudio/Web (and more) backends
• catch bugs
• easily add/drop features

TODO

• Pulseaudio backend
• Alsa (unix) backend
• Dummy backend
• Jack backend
• WASAPI/Asio (Windows) backend
• sysaudio: very noisy warnings when running tests on Linux #484
• Web backend
• CoreAudio (Apple) backend
• AAudio backend (Android)

Currently progress can be followed in alichraghi/libsoundio

[emidoots]

Very exciting :) Do you think we could easily shell out to the C implementation of libsoundio to merge this work more quickly?

e.g. use the new Zig backend for pulseaudio/alsa right now, and shell out to libsoundio for the others? Or would that be more work

[alichraghi]

Hmm, not too hard but it's changing so fast and both PulseAudio and Alsa backends still has known bugs (and more features :P ). i think i'll find it stable enough to do that after implementing WASAPI