Quantiles Chart
A quantile chart visualizes the distribution of a single category, "Residential," by displaying its quantile values as stacked horizontal bars. The chart overlays upward- and downward-pointing triangles and diamonds to mark additional summary statistics, such as minimum, maximum, and effective values, using distinct red and green colors. The visualization is built with D3 v4, using SVG rendering and scales like `d3.scaleBand` and `d3.scaleLinear` to position the elements. Data is hardcoded in the script, and the axes are styled with custom tick formatting and gridlines.