Feature/main simulation high level workflow

High-level workflow for the simulation, preservation and processing of DL0 to DL3 + IRFs data.

Simple Rabix/benten render:

Full CWL Viewer render is available here: https://w3id.org/cwl/view/git/edd82fc41baddb7e01c638998d882d4f4fddaadc/workflows/uc-dpps-XXXX.cwl