Audio Engine: Support playback for other formats

[RobDavenport]

Currently, we only support .wav files which are huge and uncompressed.

We can probably leverage some crates like:

Symphonia - A variety of formats lewton - .ogg Vorbis claxon - .flac

To provide decoding for the formats.

Additionally, this also could help compact the game size if we could convert audio assets into a single kind, although not a priority now.

[cycle-five]

I'm possibly interested in working on this. I'd probably go the Symphonia route, since I'm familiar with it from working with songbird.