[Vega-Lite] 3.1 HTML setup
This example demonstrates a blank HTML page set up as a minimal foundation for embedding Vega-Lite visualizations. The page loads the Vega 5, Vega-Lite 5, and Vega-Embed 6 libraries from the jsDelivr CDN, with an empty `<div id="vis">` element where a chart would be rendered. The setup uses plain HTML with JavaScript library includes, rather than any React or other framework integration. The accompanying README references a React starter alternative, but the code itself shows only the static HTML scaffolding, defining the necessary dependencies for future chart creation.