chore(notification): link sample project for single instance

Author: marin-bratanov

_contentTemplates/notification/templates.md

@@ -0,0 +1,6 @@
+#one-instance-per-app-link
+
+You can declare a single notification instance in the main layout of your app and pass it down to all components in the app so they can all show notifications if they need to. You can find an example implementation in the [One Notification Instance for All Components](https://github.com/telerik/blazor-ui/tree/master/notification/single-instance-per-app) sample project.
+
+#end
+

components/notification/open-close-hide.md

@@ -29,6 +29,7 @@ You can use it in two ways:
 * [Use Only the Text and ThemeColor Properties](#use-only-the-text-and-themecolor-properties)
 * [Pass a NotificationModel to the Method](#pass-a-notificationmodel-to-the-method)
 
+You can also [show all notifications for your app from a single instance](#show-from-anywhere) so they all [stack together]({%slug notification-stacked-notifications%}) and also stay between page navigations.
 
 ### Use Only the Text and ThemeColor Properties
 
@@ -79,6 +80,10 @@ You can pass the entire [NotificationModel]({%slug notification-overview%}#notif
 }
 ````
 
+### Show From Anywhere
+
+@[template](/_contentTemplates/notification/templates.md#one-instance-per-app-link)
+
 ## Close and Hide
 
 There are two separate ways to close a notification:

components/notification/overview.md

@@ -122,11 +122,14 @@ You can find more information on opening, closing and hiding the Notification in
 } 
 ````
 
+>tip @[template](/_contentTemplates/notification/templates.md#one-instance-per-app-link)
+
 ## See Also
 
   * [Live Demo: Notification](https://demos.telerik.com/blazor-ui/notification/overview/)
   * [Appearance Settings]({%slug notification-appearance%})
   * [Open, Close and Hide]({%slug notification-open-close-hide%})
   * [Templates]({%slug notification-templates%})
   * [API Reference](https://docs.telerik.com/blazor-ui/api/Telerik.Blazor.Components.TelerikNotification)
+  * [One Notification Instance for All Components Sample Project](https://github.com/telerik/blazor-ui/tree/master/notification/single-instance-per-app)
 

components/notification/stacked-notifications.md

@@ -41,7 +41,10 @@ When you invoke multiple notifications from the same component reference they wi
 }
 ````
 
+>tip @[template](/_contentTemplates/notification/templates.md#one-instance-per-app-link)
+
 ## See Also
 
   * [Live Demo: Notification Overview](https://demos.telerik.com/blazor-ui/notification/overview)
   * [Notification Overview]({%slug notification-overview%})
+  * [One Notification Instance for All Components Sample Project](https://github.com/telerik/blazor-ui/tree/master/notification/single-instance-per-app)