Support for Dense RAG

[sudhanshu746]

Checked

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

Feature request

Support Dense RAG for PGVECTOR https://paperswithcode.com/paper/blended-rag-improving-rag-retriever-augmented/review/

Motivation

Accuracy of Dense RAG seems to be very high compare to Hybrid search

Proposal (If applicable)

I can contribute if required.