Feature Request: Waveform Digitization

[ruse-traveler]

Related to #1081 and #696. The development of more realistic digitization models which are grounded in the actual hardware which each subsystem will use will require implementing some form of waveform digitization (e.g. in the HGCROC-based systems).

In turn, this could enable a more granular control over the noise applied during the digitization stage wherein the user could convolute a provided shape with the waveform. Such functionality was identified as a want from the calorimetry side during TDR discussions.