Hello VizHub
This example displays a single, static text message, “Hello VizHub!”, centered on a dark blue screen with large, light-colored Ubuntu typography. It serves as a minimal demonstration of the VizHub platform’s basic workflow. The visualization is rendered using D3 v5, specifically the `select` API to target the `#message` DOM element and set its text content. The message itself is defined as an ES6 module export, and the styling comes from an external stylesheet that imports the Ubuntu font.