support vector index

[Jant1L]

Support create vector index and query similarity

example：

• CALL vector.AddVectorIndex('person', 'vector', 'IVF_FLAT', 4, 'L2' ,10);
• CALL vector.DeleteVectorIndex('person', 'vector', 'IVF_FLAT', 4, 'L2');
• CALL vector.ShowVectorIndex();
• CALL vector.VectorIndexQuery('person', 'vector', [1,2,3,4], 4, 5);

What it support now： FAISS IVF_FLAT

TODO: support more vector index algorithm and library

[CLAassistant]

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:white_check_mark: Jant1L
:x: PPPoint-t
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