RAG system tutorial: a new generation of answer generation system based on arXiv paper

RAG system tutorial released! The system is based on arXiv papers as contextual sources, providing links to source papers used when generating answers. Tutorial link: https://colab.research.google.com/drive/1Lc8eq8P87JjzUhbYb33_c7h7njsWb-hn#scrollTo=eCSBhP4FxOg3. The tutorial shows in detail the process of implementing the RAG system, including obtaining the paper text, using Unstructured to preprocess and chunk the PDF document, creating a ChromaDB retriever, setting up RAG and LangChain, and defining the response link function.