automatic correct langchain library

[BBC-Esq]

Automatically select correct langchain class based on the embedding model name.

"""
(1) Chooses an appropriate langchain library based on the enbedding model name.  Matching code is contained within fun_localGPT.py.

(2) Provides additional arguments for instructor and BGE models to improve results, pursuant to the instructions contained on
their respective huggingface repository, project page or github repository.
"""

"""
(1) Chooses an appropriate langchain library based on the enbedding model name.  Matching code is contained within ingest.py.

(2) Provides additional arguments for instructor and BGE models to improve results, pursuant to the instructions contained on
their respective huggingface repository, project page or github repository.
"""