added readme for langchain

Author: jjmachan

Langchain/README.md

@@ -1,2 +1,9 @@
 # Langchain Internals
+> Langchain as a framework is just text permutation and network calls to LLM APIs. The real magic is the community
+> exploring the boundaries of what you can do with LLMs and implementing them back into the project.
+> The collective wisdom and creativity of the community is truly special.
 
+This is my notes as I'm exploring the LlamaIndex codebase. If you're looking to contribute or interested in understanding more about how Langchain works under the hood I think this would be useful for you too 🙂. 
+
+### Content
+1. [Prompts](./) - Prompts is langchain's abstraction over the strings you pass into models but it does have some tricks up its sleeve that help you when building Apps.