D3 v5 Zoomable Sunburst
This zoomable sunburst visualizes the hierarchical structure of the Flare dataset, using colored arcs to represent categories and nested segments for subcategories. Clicking a segment smoothly zooms into that branch, animating the radial layout via `d3.transition` and `attrTween`. Rendered with SVG, it leverages `d3.partition`, `d3.hierarchy`, and `d3.arc` to compute the layout, while `d3.scaleOrdinal` and `d3.interpolateRainbow` drive the color scheme, with labels and tooltips (`<title>`) providing details on demand.