Add example notebook with Deep Lake vector database

[FayazRahman]

This notebook shows how to implement a question answering system with LangChain's Deep Lake integration as a vector store and OpenAI embeddings.

[mikayelh]

hi there @logankilpatrick , bumping this up in case it's possible to merge to add Deep Lake to the list of vector databases, we need more open source ones out there:)

[mikayelh]

hi @ted-at-openai, just noticed you review a similar pr . Would really appreciate you taking a look at this, too, as it has been up there for a while now.

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[FayazRahman]

@simonpfish I have updated the PR and the description, hope everything looks good now!

[simonpfish]

Looks good! Thank you for doing that. One last thing, I'd recommend dealing with this deprecation warning and using the latest version of that function:

And completely optional, but sometimes I find it helpful to hide the outputs of the installation cell to make the notebooks easier to read.

[FayazRahman]

@simonpfish Fixed!

[simonpfish]

Thanks for the contribution!