ListOptionGroup integration to Angular/Blazor

[atmgrifter00]

Pull Request

🤨 Rationale

• 791

👩‍💻 Implementation

Standard integration implementations for Angular/Blazor.

🧪 Testing

Standard unit tests for Angular/Blazor. Updated both example apps.

✅ Checklist

• [ ] I have updated the project documentation to reflect my changes or determined no changes are needed.