Memo rag notebook

[erantr1]

Added a notebook that outlines the MemoRAG technique and explains how MemoRAG works in principle.
Included an implementation of the workflow and a demonstration of the results on sample data.

[NirDiamant]

Hi!
very nice work.
several things to change/add:

1. Please add documentation to the first cell of code of memory base classes
2. please write a function that displays the results and use it in each of the examples (the code focuses maximally on understanding the logic)
3. as this method uses external memory of the db and should get better results, it is crucial in this case to compare it with a vanilla RAG over the exact same queries (you can take the code from the basic tutorials in the repo)
   thanks!

[erantr1]

@NirDiamant

Going through the code again I realized it may return nice answers but the pipeline/workflow was not well-aligned with the paper. So I made some changes and now I think it's much better.

I also added documentation to the renewed Memory Class and I think I now have the function you asked for in section 2 (I'm not 100% I understood what you meant there, but if I did then it's solved).

I still need to add the comparison to vanilla RAG. Will do it ASAP.