[Feature request] Add Lasso variant for UI Stamp icon stamps

### Description

The **UI Stamp** icon variants currently support Pin and Bracket annotation styles. Add a Lasso variant for icon stamps, giving users a third option for highlighting UI elements with icon-based annotations.

### Use case

Lasso-style annotations are useful when you need to call out irregularly shaped or grouped UI elements that don't fit neatly within a pin or bracket. This approach is similar to how Microsoft's annotation components handle icon stamps.