Add partial dependency plots

[be-marc]

Following the Moosbauer 2022 Paper https://arxiv.org/pdf/2111.04820. See also the R implementation https://github.com/slds-lmu/paper_2021_xautoml and Python https://github.com/dwoiwode/py-pdp-partitioner. The DeepCave implementation https://github.com/automl/DeepCAVE/blob/58d6801508468841eda038803b12fa2bbf7a0cb8/deepcave/plugins/hyperparameter/pdp.py#L326-L346.

[b-zhou]

PDP via the iml package (as in the Moosbauer paper) has been implemented in #16. Some more testing might still be needed.