Add Plume event model classes

This MR adds the event model classes for the Plume decoding (Rec!2771 (merged)) and also base support for simulation in Gauss and Boole (MRs to follow later).

PlumeAdc.h – a class that represents adc count for Plume. It stores the adc value (12 bit integer, 0-4095), id of the Pmt that it belongs to, and whether it is over-threshold or not. PlumePmtID.h/cpp – a class that represents an id of the pmt