Coarsening

Created by: Aske-Rosted

An attempted implementation for solving #431.

Creates a new class generators, which are called after the extractors in the graphnet/src/graphnet/data/dataconverter.py script.

The idea is that this class in the future can be used more generally if one wishes to create a new feature variable pulsemap etc. when reading from the I3 files.

Also introduces the CoarsePulseGenerator as the first example of a generator. Two of the functions called in CoarsePulseGenerator. have been left out of the class as they in principle could be moved to graphnet/src/graphnet/models/coarsening.py however I did not quite feel like that was appropriate either.

src/graphnet/data/generators/__init__.py

+"""Collection of I3Generators, for generating additional data from I3Frames."""
+
+from .generator import Generator, GeneratorCollection
+
+from .coarsepulsegenerator import CoarsePulseGenerator