Add option for `enable_correlations=True` in `decode_to_matched_dets_array` and `decode_to_matched_dets_dict`

[oscarhiggott]

And also in the methods pymatching.Matching.from_detector_error_model_file and pymatching.Matching.from_stim_circuit_file

[noobyogi0010]

Hey @oscarhiggott
Is this still in scope? If so, I can try adding these.
Thanks!

[oscarhiggott]

Sure yes these are still in scope, thanks!