Current limitation: DiagramConnectionType only supports Cascading (orthogonal) and Polyline types. There is no curved or Bezier option.
Requested feature: Add a new connection type such as DiagramConnectionType.Bezier or DiagramConnectionType.Curved that:

• Renders smooth curved lines between shapes
• Provides natural-looking connections for complex diagrams
• Optionally allows control point customization

Use case: For workflow diagrams with many crossing connections, curved lines improve visual clarity and reduce cognitive load compared to sharp 90° angles.