Window Backdrop Support : Mica and Acrylic

- [ ] Win 11 theme in WPF should also support acrylic background, Mica styles for eg: Transparent glass like background
- [ ] App layering and card layout are some more detailed features of the mica material theme which should be supported to bring the same look and feel to WPF apps. 
- [ ] Measure the performance impact of the changes for Mica and Acrylic