Polished Bar Chart
A polished bar chart displays the top 10 countries by population for 2020, using horizontal bars with a clean axis and labeled ticks. Data is loaded from a CSV file via `d3.csv`. The chart is built with React, rendering SVG elements, and uses `d3.scaleBand` and `d3.scaleLinear` for scales. Axis formatting applies `d3.format` with a suffix replacement, while styled ticks and rectangles provide a refined visual presentation.