docs: Hybrid RAG with Qdrant

[Anush008]

Desciption

This PR adds an example of using Docling with Qdrant - https://qdrant.tech/ for Hybrid RAG with chunking.

Checklist:

• Commit Message Formatting: Commit titles and messages follow guidelines in the
  conventional commits.
• Documentation has been updated, if necessary.

[vagenas]

(superseded by comment below)

[vagenas]

Additionally to the in-line comments, please also append your example to the RAG/QA examples section in mkdocs.yml such that it appears in the docs nav, i.e.:

    - RAG / QA:
      - "RAG with LlamaIndex 🦙": examples/rag_llamaindex.ipynb
      - "RAG with LangChain 🦜🔗": examples/rag_langchain.ipynb
      - "Hybrid RAG with Qdrant": examples/hybrid_rag_qdrant.ipynb

You can check docs changes locally with mkdocs serve.

[Anush008]

Thanks @vagenas. I've addressed your suggestions.

[vagenas]

Cool, thanks for this nice example!