Add feature : add chromadb support as a vector database

[powerli2002]

This PR is independent of ES and is based on the latest main branch.

This PR partially addresses the #57 (comment)

Abstract：
Support for chroma as a vector database has been implemented in ModelCache.

Notes:
The implementation of chromadb in this PR uses the chromadb.PersistentClient method to persist it locally. According to the official documentation, this is not a method suitable for production environments. If changed to HttpClient or AsyncHttpClient, the chroma run --path /db_path command needs to be run in advance, which might need to be mentioned in the README document.

Example for chromadb_config.ini

[chromadb]  
persist_directory=./chromadb

I have found some inconsistencies in multicache, such as:

• For the vector database, the logic implemented with Redis is that different types of data are stored in different index, while this logic does not exist in Faiss.
• Multiple method names are inconsistent with the corresponding vector database methods of the non-multimodal modelcache. For example, rebuilding the database has the multimodal method: def rebuild_idx(self, model):, and the non-multimodal method: def rebuild_col(self, model):.
• In the multimodal Redis implementation logic, almost all methods use the parameter mm_type, but when calling these methods, there are cases where this parameter is not passed, such as in add, delete, etc. However, due to the need to store data, I still chose to store the data in different collections.
• Additionally, some software packages may not have been included in the requirements.txt.

Given the lack of relevant documentation and my limited understanding of certain features of multicache, as well as the above confusions, my multimodal implementation is for reference only, and if there are any issues, feel free to contact me.

[peng3307165]

Thank you for your continued work. We plan to send you a CodeFuse souvenir. You can also participate in activities related to CodeFuse open source in the future. Can we obtain your contact information? My email is: hongen.phe@antgroup.com

[powerli2002]

Thank you for your continued work. We plan to send you a CodeFuse souvenir. You can also participate in activities related to CodeFuse open source in the future. Can we obtain your contact information? My email is: hongen.phe@antgroup.com

Thank you kindly. I have contacted you via my private Foxmail email. Please check your inbox at your convenience.

[peng3307165]

Thank you for your contribution to the ModelCache project! we've accepted your code. We truly appreciate your efforts and collaboration. Best wishes!