Adding Herwig support: - Issues with setup https://github.com/key4hep/key4hep-spack/issues/770 - setting if coupling constants - coupling ALPHAEM seems to be inverted in a [Herwig Manual](https://arxiv.org/pdf/0803.0883) section 5.4.1 bottom - 1particle selectors to be implemented - 2particle selectors to be implemented - FSR on/off to be implemented - ISR on: to be checked (inconsisten with manual)
Adding Herwig support: