Port over the resampling container from iPlug2 ([`RealtimeResampler`](https://github.com/sdatkinson/iPlug2/blob/fix-resampler/IPlug/Extras/RealtimeResampler.h), [`LanczosResampler`](https://github.com/sdatkinson/iPlug2/blob/fix-resampler/IPlug/Extras/LanczosResampler.h)) Only need the Lanczos filter version.