Add comprehensive README.md documentation for GymApp project#1

Rohanvish4 merged 1 commit intomainRohanvish4/GymApp:mainfrom

copilot/fix-cc29b37d-0c80-4e27-9107-bc88878adf27Rohanvish4/GymApp:copilot/fix-cc29b37d-0c80-4e27-9107-bc88878adf27Copy head branch name to clipboard