Directory structure/hierarchy in create-react-app needs UPDATE

[M-Usman-91]

I have created pull request #11874.
Kindly review it.

Problem

The directory hierarchy is outdated and I mentioned in my pull request #11874 the newer structure.
Kindly review and merge it if it seems fine to you or close it.

[M-Usman-91]

I request @ianschmitz @iansu @petetnt and @mrmckeb to review this issue and the respective PR...