Hello VizHub
This example demonstrates the basic setup and execution of a visualization in VizHub. It renders a single static message, “Hello VizHub!”, on the page using the D3.js library (version 5.9.1). The code imports the `select` function from D3 to target a `div` element and set its text content from a constant defined in a separate ES6 module. Styling is applied via an external stylesheet that imports the Ubuntu font from Google Fonts and defines the page’s dark blue background and large centered text.