Merge pull request #1 from realkrutosh/fix/readme-error

Fix readme error

Pushing agents and tools changes

Finish refining rag code.

Update rag example 2

Clean up 1_rag example

update code during demo

clean up chat_models

Update docs in chat models

update readme

accidentally left out examples

Update readme and create .env.example for easy copy and paste

remove complicated agent examples

finished react docstore example

clean up repo and remove unused code. fixed react agent chat