Build a Star Rating component in React.

Requirements:

1. Display a row of star icons (e.g., 5 stars).
2. Clicking a star sets the rating to that value.
3. Filled stars indicate the current rating.
4. Users can change the rating by clicking a different star.
5. Focus on functionality over styling.
6. The component should work out-of-the-box in a live React preview (e.g., CodeSandbox/Sandpack).