Add link to EAP blog post and 2x img on In progress pages (DevExpress#29669)

Co-authored-by: Mikhail Preyskurantov <[email protected]>

Author: dxvladislavvolkov

apps/demos/Demos/CardView/Overview/cardview.png

@@ -2,6 +2,8 @@ In our upcoming major release (v25.1) the DevExtreme Scheduler will include a cu
 
 For instance, in the screenshot, our new toolbar includes two custom buttons: "Today" and "New event".  
 
+We published the DevExtreme v25.1 EAP build with an early preview of this component. For more information, refer to [our blog post](https://community.devexpress.com/Blogs/javascript/archive/2025/04/21/devextreme-early-access-preview-v25-1.aspx).
+
 <!--split-->
 
 Configuration options will include: