Feature/rag_agent

[MartBakler]

• Moved most examples how to use FLE into a separate "examples" folder from agent.md files
• Cut down on agent.md files to focus on the functions they are explaining
• Added controllers that read in examples into system_prompt in instance
• Added new set of tools in tools/rag that are for information querying and not interacting with environment
• Changed instance system prompt output to be dictionary of different parts and added util methods to construct system prompt from them at agent/utils/prompt_utils.py
• Added query agent that utilises retrieving information and does not have all examples in token memory, thus cutting token sizes