Stylized Bar Chart
This stylized bar chart displays the top 10 most populous countries using horizontal bars, with country names on the y-axis and population on the x-axis. Built with React and D3 v5, the chart uses `scaleBand` for the y-axis, `scaleLinear` for the x-axis, and SVG `rect` elements for the bars. Population values come from the UN World Population Prospects 2019 dataset, formatted with D3’s `format` to display values in billions. The visualization includes axis labels, tick marks, and hover tooltips via SVG `<title>` elements.