Proposal/Request: ThemeShadow page

[marcelwgn]

Is this a totally new sample, an addition to an existing sample page, or a modification of an existing sample page?

• New sample
• Addition to existing sample
• Modification to existing sample

If this is an addition/modification to an existing sample page, which one?

Describe the sample

ThemeShadows are one of the core ways to implement Z-depth in UWP/WinUI. However there is no page showing how to use ThemeShadows despite having pages for other non control features such as ThemeTransitions.

Is your sample request related to a problem? Please describe it

The "problem": I wanted to quickly add a themeshadow and my instinct was: There surely is a page in the XCG that I can consult for this. Searching for "shadow" however revealed that there doesn't seem to be a page for this.
Additional context

The existing documentation on ThemeShadows: https://docs.microsoft.com/en-us/windows/uwp/design/layout/depth-shadow