Hybrid Search Tutorial (#165)

* Re-organize docs

* Rename notebooks

* Move nbs

* Working Sparse and Dense Search

* Add RRF

* Refactor code to improve performance and readability

* Add ESCI label for the RRF results

* Update docs/examples/Hybrid_Search.ipynb

Co-authored-by: Anush  <[email protected]>

* Update docs/examples/Hybrid_Search.ipynb

Co-authored-by: Anush  <[email protected]>

* Remove unnecessary code and update vector format

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Co-authored-by: Anush <[email protected]>

Author: NirantK