svg fundamentals
This example demonstrates the "Hello World" of a VizHub V3 runtime environment, a blank slate for interactive coding. It uses a `main` function exported from `index.js` to inject an HTML div into a container, with the font size set to 217 pixels. The code highlights hot reloading via Alt-drag interaction on numeric values, enabling real-time visual updates without manual refreshing. The rendered text is centered, showcasing the simplicity of the environment's setup.