Implement new UIDrawable-derived classes for vector graphics:
- UILine: Thick line segments using sf::ConvexShape for proper thickness
- Properties: start, end, color, thickness
- Supports click detection along the line
- UICircle: Filled and outlined circles using sf::CircleShape
- Properties: radius, center, fill_color, outline_color, outline
- Full property system for animations
- UIArc: Arc segments for orbital paths and partial circles
- Properties: center, radius, start_angle, end_angle, color, thickness
- Uses sf::VertexArray with TriangleStrip for smooth rendering
- Supports arbitrary angle spans including negative (reverse) arcs
All primitives integrate with the Python API through mcrfpy module:
- Added to PyObjectsEnum for type identification
- Full getter/setter support for all properties
- Added to UICollection for scene management
- Support for visibility, opacity, z_index, name, and click handling
closes#128, closes#129🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
