create
Creates a UIViewController that renders the widget using Compose Multiplatform. This provides full interactivity - buttons, gestures, animations all work!
Data fetching happens automatically - this function handles it internally.
Called from Swift to create the widget view for WidgetKit.
Return
A UIViewController containing the Compose widget, or null if widget not found
Parameters
widget
The name of the widget to render
family
The iOS widget family (e.g., "systemSmall", "systemMedium")