Extending Spectre.Console with Custom Renderables

An explanation of how developers can create their own widgets or renderable components. It discusses the IRenderable interface and the expected implementation of the Render method to output a Segment sequence (or other renderable content). It might walk through a conceptual example of a custom renderable (e.g. a simple "progress pie" text graphic) without full code, explaining how to integrate it so that AnsiConsole.Render(myRenderable) will work. This section helps advanced users understand the extension points of the library and how Spectre.Console is designed for flexibility.