Add support 'sklearn.neighbors._nca.NeighborhoodComponentsAnalysis'

[jaehyeongAN]

sklearn.neighbors._nca.NeighborhoodComponentsAnalysis is an algorithm that uses a technique similar to k nearest neighbors to find a space in which neighborhoods of points sharing the same labels are tighter than points with different labels.
NCA is very powerful if using with K-Nearest Neighbors. So. recently, NCA+KNN pipeline is used in many ml projects.

please, support NeighborhoodComponentsAnalysis model.

[interesaaat]

Hi @jaehyeongAN! I can take a look at this and let you know.