feat(lotus): format support

[sammy-ette]

lotus (the library for playing audio) currently only does mp3. it should support

• wav
• flac (https://pkg.go.dev/github.com/mewkiz/flac)
• ogg/vorbis? (https://pkg.go.dev/github.com/hajimehoshi/ebiten/v2@v2.4.12/audio/vorbis)

maybe consider https://pkg.go.dev/github.com/nareix/joy4 for aac
or https://github.com/jason12360/goav for other formats