chore: Refactor visual rendering so ShapeVisual is able to draw its Shapes in normal process without assuming Visual implementation (calling Restore on Save made by Compositor)

fix(composition): Use ShapeVisual as visual for UIELement, use its Shapes to render "local content" instead of adding sub-visual, and its ViewBox to properly clip transformed content.

fix(composition): Fix multiple RotationAngleInDegrees implementation and uniformize the Transform support of composition objects

perf: Faster ImmutableList.Add