Document file interdepencies

[meganindya]

This project has a lot of inter-dependencies between its source files. This can be intriguing when trying to get a big picture. Document the interdependencies and exposed members in src/README.md.

[ojuschugh1]

Sir, I found that there is no src/README.md rather it is an src/execution/scope/README.Md file.

Thanks and Regards

[ojuschugh1]

Hi, @meganindya Please review it once I have done some changes.

Thanks and Regards