Enhancement Request : Documentation - Include boto3 vs. langchain comparison in context of Bedrock

Hi Dinesh,

Firstly, thanks a lot for taking time to write this and sharing it with the community.

I was wondering that since you covered 2 methods (boto3 and langchain) to integrate with Foundation models offered by AWS Bedrock service, it will be helpful if you can also include a section in README to help readers understand the fundamental difference between those 2 options and provide some kind of guidance framework to help them choose one over the other. Thanks.