Describe the problem this feature would solve

The current Toolkit implementation allows for setting the visibility of the gaze cursor and the radius of the ellipse.

The brush however, can not be changed - which is unfortunate because the default color does look great and having the flexibility to change it (for e.g. dark vs light themed UIs) to create more accessible apps would be great!

Describe the solution

• Add a method that allows for setting the gaze cursor brush.

The current available methods are:
public static void SetIsCursorVisible(UIElement element, bool value);
public static void SetCursorRadius(UIElement element, int value);

The proposed method would be:
public static void SetCursorBrush(UIElement element, Brush value);

Additional context & Screenshots