Configure for deployment

[bwoody13]

• Update specific import locations to avoid deprecation warnings from langchain
• Add dictionary to scraper for file contents to avoid re-requesting same file from API
• Reformat prompts
• get user inputted OPENAI_AI_KEY if there is not one in .env
• Add some additional guidance in prompt to refer to functions and be able to provide code
• Add that rover should call the user "{REPO_NAME} Explorer"
• Update requirements for streamlit deployer