Smiley Face part 1
A static SVG smiley face renders a yellow circle with black outline, two smaller unfilled circles for eyes, and no mouth yet. Built with React and ReactDOM, the example mounts an empty `App` component into the DOM root while the SVG elements are hardcoded directly in the HTML file. The visualization introduces basic SVG shape attributes such as `cx`, `cy`, `r`, `fill`, and `stroke` within a 960-by-500 viewport, serving as a foundation for a future interactive face.