Draft: Feature/pre processing

Overview

Generalizes the filtering to pre-processing. This means you can run as many filters as you want in order, and run other function that take in a waveform and spit out a waveform.

Tested

Used the normal FilterPorcessor tag and worked Used the new preprocessor tag and applied 2 filter and worked as expected. Used the downsamepling

TODO

Test if the downsampling is working correctly (looks zoom in and now downsampled)