Move llama-index to experimental group

Author: jonbesga

pyproject.toml

@@ -69,11 +69,10 @@ cohere = ["cohere"]
 anthropic = ["anthropic"]
 openai = ["openai"]
 mistralai = ["mistralai"]
-llama-index = ["llama-index"]
 qdrant = ["qdrant-client"]
 kg_creation_tools = ["pygraphviz"]
 sentence-transformers = ["sentence-transformers"]
-experimental = ["pypdf", "fsspec", "langchain-text-splitters", "pygraphviz"]
+experimental = ["pypdf", "fsspec", "langchain-text-splitters", "pygraphviz", "llama-index"]
 examples = ["langchain-openai", "langchain-huggingface"]
 
 [build-system]