Fork of D3.js collapsible tree with boxes
This is a collapsible tree visualization that displays hierarchical data in rectangular nodes with labels, types, and metadata. The tree shows parent-child relationships with directional links and colored nodes based on the `type` field, allowing users to expand or collapse branches. The visualization is built with D3.js v3, using `d3.layout.tree()` for layout computation, SVG for rendering, and jQuery for interaction. The tree supports zooming and dragging through d3.behavior.zoom, with animated transitions between states.