Force Network
A force-directed network diagram maps relationships between actors, directors, and films, using node colors to distinguish roles and link markers to show direction. The visualization runs a `d3.forceSimulation` with link, charge, collision, and centering forces, while SVG circles and text labels represent nodes, and lines with arrowheads depict connections. Node positions update on each simulation tick, and dragging via `d3.drag` lets users reposition elements, with hover effects highlighting selected nodes. The chart renders from the provided `data.json` file and uses `d3.scaleOrdinal` for the color scale.