added memory layer nb

[ajaykrish-uns]

Note

Adds a new notebooks catalog card linking to a Colab on integrating a memory layer (Mem0) with Unstructured for personalized RAG.

• Docs / Notebooks:
  • Add new card in examplecode/notebooks.mdx for "Adding a Memory Layer to RAG with Unstructured and Mem0" linking to notebooks/MemoryLayer_for_RAG.ipynb, with brief description and tags (Unstructured API, Workflows, RAG, S3, Weaviate, Memory).

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