Return Jaguar documents most similar to query, along with scores. Args: query: Text to look up documents similar to. k: Number of Documents to return. Defaults to 3. lambda_val: lexical match parameter for hybrid search. where: the where clause in select similarity. For example a where can be "rating > 3.0 and (state = 'NV' or state = 'CA')" args: extra options passed to select similarity kwargs: vector_index=vcol, vector_type=cosine_fraction_float Returns: List of Documents most similar to the query and score for each. List of Tuples of (doc, similarity_score): [ (doc, score), (doc, score), ...]