Add support for audio conversion

[vivaria]

Currently, tja2fumen only converts the chart data and ignores the audio file. This is because TakoTako handles audio conversion already, and tja2fumen was originally just meant to be a replacement for tja2bin.

But, we could consider expanding the scope of tja2fumen to include audio conversion as well, so that TakoTako isn't needed for converting the song as a whole. This would be beneficial for people who want to convert songs for platforms that aren't TDMX/TakoTako.

This feature request is split into multiple sub-features, as there are multiple target audio formats that could be supported:

• [ ] Add support for XB1 audio conversion (ACB/Criware)
• [ ] Add support for Nijiro audio conversion (nus3bank)

[vivaria]

Currently, TakoTako handles audio conversion via third-party C# libraries, namely:

• NAudio
• SonicAudioLib
• VGAudio

So, we would either need to find equivalent Python libraries (e.g. PyCriCodecs), or wrap the existing built C# executables?

[vivaria]

Given that tja2fumen has been wrapped by two separate projects:

• XB1/TDMX: TakoTako converts both chart and audio files for XB1/TDMX.
• Nijiro: TaikoSoundEditor converts both chart and audio files for NIjiro.

I think it might be better for tja2fumen.exe to stay scoped to just converting chart files, while the other projects handle the audio conversion.