[Testing] Feature matrix UITest Cases for Visual Transform Control

[HarishKumarSF4517]

This pull request adds a new VisualTransform feature matrix to the test application, allowing users to interactively explore and manipulate visual transformation properties (such as rotation, scale, translation, anchor points, and shadow) on a sample UI element. The implementation includes a new view model, Control page, and options page for setting transformation parameters.

VisualTransform Feature Matrix Addition

• Added a new entry for the VisualTransform feature matrix in the main gallery page list, exposing it in the test app UI (CorePageView.cs).

• Introduced VisualTransformControlPage and VisualTransformControlMainPage, which display a demo element whose visual transformation properties can be interactively modified and reset. Navigation to an options page is supported for property editing (VisualTransformControlPage.xaml, VisualTransformControlPage.xaml.cs). [1] [2]

• Added VisualTransformOptionsPage for editing transformation properties (rotation, scale, translation, anchor points, visibility, and shadow) with two-way data binding to the view model (VisualTransformOptionsPage.xaml, VisualTransformOptionsPage.xaml.cs). [1] [2]

• Implemented VisualTransformViewModel to encapsulate all transformation-related properties, support property change notifications, and provide a reset command for restoring default values (VisualTransformViewModel.cs).

Identified Issue:

• [iOS, macOS] Applying Shadow property affects the properties in Visual Transform Matrix. #32724
• [Android] Applying Shadow property affects the properties in Visual Transform Matrix #32731

Screen.Recording.2025-11-21.at.7.02.26.PM.mov

[dotnet-policy-service]

Hey there @@HarishKumarSF4517! Thank you so much for your PR! Someone from the team will get assigned to your PR shortly and we'll get it reviewed.