D3 tryout
This example demonstrates a basic time-series line chart using D3 version 6. It plots a single series of date-value pairs from a remote CSV dataset, with a time-scaled x-axis and a linear y-axis. The code uses `d3.csv` to load and parse the data, `d3.timeParse` for date formatting, `d3.scaleTime` and `d3.scaleLinear` for axes, and `d3.line` to generate the SVG path. The visualization renders as a simple steelblue line with axes, using an SVG container created with `d3.select`.