feat: Qdrant vector store support (#303)

* feat: QdrantRetrieveUserProxyAgent

* fix: QdrantRetrieveUserProxyAgent docstring

* chore: batch of 500 all CPU cores

* chore: conditional import for tests

* chore: config parallel, batch 100

* chore: collection creation params

* chore: conditonal payload indexing
fastembed import check

* docs: notebook for QdrantRetrieveUserProxyAgent

* docs: update docs link

* docs: notebook examples update

* chore: hnsw, payload index reference

* docs: notebook docs_path update

* Update test/agentchat/test_qdrant_retrievechat.py

Co-authored-by: Li Jiang <bnujli@gmail.com>

* chore: update notebook output

* Fix format

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Co-authored-by: Li Jiang <bnujli@gmail.com>