Control to create an App Tour Guide
Control explanation: This control should cover the entire app with a semi-transparent background except the highlighted UIElement so that the user can interact with the UIElement. In short, we need a UWP alternative to ShowcaseView (https://github.com/amlcurran/ShowcaseView)
Use of the control: This control will help the user to take a tour of the app in an interactive way.
GitHub issue link: https://github.com/Microsoft/UWPCommunityToolkit/issues/764