- Updated ExamplePage to use a single Showcase component instead of separate InputShowCase and FormShowcase components.
- Added CheckboxShowcase, FormShowcase, and InputShowCase components to the showcase directory.
- Implemented Checkbox component with various states and styles.
- Enhanced InputShowCase to demonstrate different input types and states.
- Integrated new styles for checkbox variants and states.
- Updated package dependencies to include @rc-component/checkbox.
