[FEATURE]support for rerank models

[mousounikki]

Describe the feature you'd like there is an open source rerank model bge-rerank similar to the one provided by Cohere, which is a very obvious efficiency improvement for building RAG applications. Are there any plans to develop functional support for related models, such as integrating Cohere-style APIs and providing custom BasePath?

Additional context

[HenryHengZJ]

@mousounikki we've added some rerank retrievers - https://github.com/FlowiseAI/Flowise/pull/1426

will improve in future to add more

[mousounikki]

@HenryHengZJ awesome！

[wegylexy]

How about custom API, or custom JavaScript function as a retriever?

[CoreyH]

Pinecone just added re-ranking to their API as well: https://docs.pinecone.io/guides/inference/understanding-inference#rerank-2