Replace direct internal/element usage with public ui package
components to ensure examples only use the public API:
- Add ui.RawCheckbox for plain checkbox without label wrapper
- Add ui.Span for span elements with text content
- Add View.TextDecoration modifier for strikethrough styling
- Update todo example to use these public components
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
This example demonstrates Iris reactive patterns:
- Signal holding a slice/list of todos
- Adding and removing items dynamically
- Component composition (inputRow, todoList, todoItem)
- Input handling with TextInput and Enter key support
- Conditional rendering (empty state, strikethrough for completed)
Closes#5
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
