firestore as a VectorStore

[glorat]

Checked

• I searched existing ideas and did not find a similar one
• I added a very descriptive title
• I've clearly described the feature request and motivation for it

Feature request

Provide community offering for langchain-firestore that provides a FirestoreVectorStore. Per https://firebase.google.com/docs/firestore/vector-search this is now in public preview.

Motivation

I'm already using firestore as a document/chunk repository and have had to historically store the vector embeddings elsewhere. Now that firestore can index vectors I can potentially do away with an extra db

Proposal (If applicable)

I don't see any existing work on this so I've already started coding a FirestoreVectorStore myself and would be happy to contribute this back to @langchain/community (but might need some help with this non-trivial PR)

[Reza-1]

I noticed there is already FirestoreVectorStore for LangChain in python,
https://python.langchain.com/docs/integrations/vectorstores/google_firestore/
wondering if that can be ported to langchainJS

[ladrians]

+1 to this issue, are plans for porting it to langchainjs?