use_cases folder update

recipes/use_cases/README.md

recipes/use_cases/agents/langchain/langgraph_rag_agent.ipynb

...se_cases/agents/langchain/langgraph_rag_agent_local.ipynb

...cases/agents/langchain/langgraph_tool_calling_agent.ipynb

recipes/use_cases/coding/text2sql/csv2db.py

recipes/use_cases/coding/text2sql/nba.txt

recipes/use_cases/coding/text2sql/nba_roster.db

recipes/use_cases/coding/text2sql/structured_llama.ipynb

recipes/use_cases/coding/text2sql/txt2csv.py

...merservice_chatbots/RAG_chatbot/RAG_Chatbot_Example.ipynb

...chatbots/RAG_chatbot/data/Llama Getting Started Guide.pdf

...ses/customerservice_chatbots/RAG_chatbot/requirements.txt

...ice_chatbots/RAG_chatbot/vectorstore/db_faiss/index.faiss

...rvice_chatbots/RAG_chatbot/vectorstore/db_faiss/index.pkl

.../mongodb/rag_mongodb_llama3_huggingface_open_source.ipynb

...stomerservice_chatbots/messenger_llama/llama_messenger.py

...tomerservice_chatbots/messenger_llama/messenger_llama3.md

...ervice_chatbots/sales_bot/Musical_instruments_reviews.csv

...e_cases/customerservice_chatbots/sales_bot/SalesBot.ipynb

.../customerservice_chatbots/whatsapp_llama/llama_chatbot.py