Add a new vector hippo for chatgpt-retrieval-plugin

[chocolate4]

No description provided.

[chocolate4]

@peterjdolan I want to add a new vector for this, please review my code.

[TranswarpHippo]

Feature request
I would like to propose a new vector database to be included in the openai ecosystem to expand openai's influence. Below is the official link to our vector database.

http://hippo.transwarp.io/

Motivation
I hope that everyone can more conveniently use Hippo + openai to build AI Agents.

Your contribution
Integrating the Hippo vector database into the openai ecosystem can expand openai influence.

This is my issue #373

Please review my code

[TranswarpHippo]

@isafulf, @peterjdolan

[barnett-yuxiang]

It is recommended to add some summaries or links about hippo.

Overall, H3 represents an innovative approach in the field of language modeling, differing from more traditional models like GPT or BERT by focusing on state-space methodologies and targeting efficiency in processing long sequences.

[TranswarpHippo]

Overall,hippo is a type of database that stores data as high-dimensional vectors, which are mathematical representations of features or attributes. It is a vector store like milvus, pinecone.

[barnett-yuxiang]

LGTM

[TranswarpHippo]

Hello, when can this part of the code be merged～