New Code Features and Updates:

Converted the class component to a functional component using hooks.
Refactored the code to use functional components, useEffect, and useRef.
Updated the imports to use the correct packages and components.
Updated the styles and layout to be more responsive and centered.
Added support for dynamic bar width using either a number (interpreted as a percentage of the screen width) or a string representing a valid CSS width value.
Improved the animation logic to handle changes in progress and bar width.
Simplified the prop types definition using PropTypes.
Overall, the new code provides a more flexible and responsive progress bar component with improved styling and animation.
README.md