Perfectly resample sound effects to the native sampling rate

[nmlgc]

The original DirectSound backend uses what seems to be a first-order low-pass filter when resampling the original sound effects to the native sampling rate. This adds a bunch of high-frequency content, which looks like this at 48000 Hz:

For the miniaudio backend implemented in #49, I went for a first-order low-pass filter as well. That gets quite close possible to the original DirectSound spectrum, and only adds a slight bit of additional crispiness to the high end:

However, some might argue that both are incorrect. If the original sound effects use sampling rates of 22050 Hz and 11025 Hz, shouldn't the spectrum look more like this?

This issue would deploy such a perfect resampler into the game, and add a toggle to the sound option menu for switching between accurate and crispy modes. Since the crispy mode is closer to what the game originally sounded like (and also sounds a lot better in my opinion), this feature is highly optional, and pretty much only meant for people who strictly define "accurate sound playback" as "not adding any frequency content that wasn't present in the original files".