similarity search by vector chroma

[claust]

This is an implementation of the similarity search by vector in Chroma, as referenced in #1450.

[claust]

can we change similarity_search_with_score to call this method now? to avoid duplicated code

Hmm, the similarity_search_with_score needs the scores, which are not returned by the similarity_search_by_vector, at least not with its current signature. Also, the filter argument of similarity_search_with_score is not present in similarity_search_by_vector so it would have to taken from kwargs? I have instead extracted the mapping of the query result to documents and scores, so this is no longer duplicated. Does this make sense?

[hwchase17]

huh what happened to the merge conflicts here?

[claust]

This PR is replaced by #1568 to fix my mistaken commits resulting in merge commits, sorry.