Fixes#30423
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## Summary by CodeRabbit
- **New Features**
- Introduced the `StatBoxComponent` for displaying statistical
information with flexibility in presentation, including icons, labels,
values, and sublabels.
- Expanded the application's widget offerings by adding the
`WDSStatBoxWidget`.
- **Enhancements**
- Improved flexibility and customization of the Flex component with the
introduction of the `isInner` property.
- Enhanced feature flag checks for quicker enablement of specific
functionalities.
- **Documentation**
- Added comprehensive configurations and documentation for the
`WDSStatBoxWidget`, including property pane settings, default
configurations, and meta information.
- **Style**
- Implemented new styling for the `StatBoxComponent`, defining its
appearance including border, width, and background.
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