AnalyseProcessAtoms : Allow custom reference

[PythonFZ]

IPSuite/ipsuite/base/base.py

Lines 133 to 145 in 75e0a5d

	class AnalyseProcessAtoms(IPSNode):
	"""Analyse the output of a ProcessAtoms Node."""
	data: ProcessAtoms = zntrack.deps()
	reference: ProcessAtoms = zntrack.deps(None)
	def get_data(self) -> typing.Tuple[list[ase.Atoms], list[ase.Atoms]]:
	if self.reference is None:
	self.data.update_data() # otherwise, data might not be available
	return self.data.data, self.data.atoms
	else:
	# TODO: support both, Nodes and Connections
	return self.reference, self.data

currently, nodes that do AnalyseProcessAtoms have a somehow hard coded reference, this should be changed to allow e.g. predictionmetrics from two different calculators more easily