Force-Directed Graph IT Fork Test
This example visualizes IT infrastructure dependencies as an interactive force-directed graph, with applications as nodes and their interfaces as links. The graph is rendered as SVG circles and lines, with node labels displayed alongside each circle. The code uses `d3.forceSimulation` with `forceManyBody`, `forceLink`, `forceCenter`, and `forceCollide` to position elements, while `d3.drag` enables interactive node dragging. It loads node and link data from separate CSV files (`applications.csv` and `interf.csv`), with links defined by named source and target accessors.