Replace libao with miniaudio

[pclov3r]

#463 and #334 show that perhaps libao has some issues.

Given it seems to be almost abandoned now perhaps it might be good to replace it with miniaudio. This actually drops a build dep requirement as miniuadio is a single header library and has wav encoding built in.

[markjfine]

Currently there is no miniaudio available for macOS. Similarly, Fedora dnf shows only miniaudio-devel, but no archival runtime package.

Alternatives?

[pclov3r]

miniaudio is a single header library you don't need to install anything or build a separate library.

https://github.com/mackron/miniaudio

Just compile miniaudio.c like any other source file and include miniaudio.h like a normal header. There's no need to install any dependencies. On Windows and macOS there's no need to link to anything. On Linux and BSD just link to -lpthread and -lm. On iOS you need to compile as Objective-C. Link to -ldl if you get errors about dlopen(), etc.

[TheDaChicken]

There is seriously something wrong with the nrsc5 c client. When playing back recordings, it will drop audio samples sometimes.

[pclov3r]

#99 Should probably be addressed as well if this is adopted.