Add "Sentence Window Retrieval" and "Auto-Merging Retrieval"

[vccler]

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1. Is this request related to a challenge you're experiencing?

Currently the RAG retrieval is very base by using Vector store with similarity searching or full-text searching. Please add some advanced retrieval methods like "Sentence Window Retrieval" and "Auto-Merging Retrieval". It will improve the RAG performance metrics, like context relevance, answer relevance and Groundedness.

2. Describe the feature you'd like to see

please refer to the online course : https://learn.deeplearning.ai/courses/building-evaluating-advanced-rag/

3. How will this feature improve your workflow or experience?

Envolve some advanced RAG retrieval methods to improve RAG performance

4. Additional context or comments

No response

5. Can you help us with this feature?

• [ ] I am interested in contributing to this feature.

[patryk20120]

As of my knowledge, the team is working on more advanced RAG pipelines.