[Request] allow evaluator to work with non-_TransformedDict dictionaries

[lilyminium]

Here:

openff-evaluator/openff/evaluator/workflow/workflow.py

Line 604 in 89e9043

for parameter in labelled_molecule[parameter_key.tag].store.values():

.store is an attribute specific to the OpenFF toolkit _TransformedDict. Given that __iter__ is defined I think you could make this more generic quite easily:

--- for parameter in labelled_molecule[parameter_key.tag].store.values():
+++ for parameter in labelled_molecule[parameter_key.tag].values():

Making it more generic opens the evaluator workflow to all ParameterHandlers that do not return _TransformedDict subclasses, e.g., dict, e.g., LibraryChargeHandler. Or more generically, a custom ParameterHandler plugin.