MNMG Random Walks - Implementation

[ChuckHastings]

Implement Random Walks.

Random walks implementation should support uniform random walks, biased random walks and node2vec random walks.

[github-actions[bot]]

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[ChuckHastings]

NOTE, CI discovered a failure in the RANDOM_WALKS_TEST, it is being disabled in another PR. When this implementation is addressed, be sure to enable the test and try and isolate why it was failing to make sure it can work going forward.