Fork of Smiley face part 1
A fork of Smiley face part 1 renders a yellow smiley face with black outlined eyes and a curved mouth using SVG. The face is centered on a 960×500 canvas, with the mouth generated by the `arc()` function from d3, which creates a path between specified inner and outer radii and start/end angles. React manages the component structure, while D3 v5 supplies the arc geometry. The eyes are positioned using offset constants relative to the center, and the entire smiley is transformed to the middle of the viewport.