Longest circular co-substring LSH

[alexklibisz]

See this paper: https://arxiv.org/pdf/2004.05345.pdf

This method isn't specific to any particular similarity.
Rather it's an alternative to the common pattern of having L hash values, each consisting of k concatenated hash values.
Results look very promising but I'm not 100% the indexing scheme is possible in Elasticsearch/Lucene.

[alexklibisz]

Closing as I don't plan to implement this. Anyone feel free to re-open and submit a PR if interested.