Support Lucene backend via PyLucene

[girishc13]

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Lucene supports ANN vector search since version 8.x. This can be a powerful and performant tool for users already familiar with lucena/solr.

Ref:

• https://solr.apache.org/guide/solr/latest/query-guide/dense-vector-search.html
• https://lucene.apache.org/pylucene/