Smiley Face - Part I
A grid of randomized smiley faces, all rendered in a vermilion orange, demonstrates how React components and D3 can be combined to generate SVG graphics. The code creates multiple `Face` components, each built from a `BackgroundCircle`, `Eyes`, and a `Mouth` that uses D3's `arc` function to draw a smile. Each face varies randomly in stroke width, eye offset, and eye radius, producing a playful, slightly chaotic arrangement. The `FaceContainer` uses an SVG `g` transform to center each face within its 160-pixel square.