Implement a utility useWindowSize() that returns the current height and width of the window.

It should automatically update whenever the window is resized, triggering re-renders (in React) or updates in plain JS.

Your task: Implement useWindowSize so that it:

• Returns an object with { width, height }.
• Updates values whenever the window dimensions change.
• Cleans up the resize listener when no longer needed.

Example

const screen = useWindowSize();

// Suppose window.innerWidth = 1200, window.innerHeight = 800
console.log(screen); // { width: 1200, height: 800 }