Conform to standard flutter package structure to address `pub.dev` score <img width="879" alt="Screenshot 2023-03-24 at 12 54 45" src="https://user-images.githubusercontent.com/93057399/227590603-52482ae9-e7ff-4711-b840-8d0dee811402.png">
Conform to standard flutter package structure to address
pub.devscore