docs: add app image on readme

Author: jourdain

QuickView-app.png

@@ -12,6 +12,8 @@ Graphical User Interface (GUI) provides
 intuitive access to [ParaView](https://www.paraview.org/)'s 
 powerful analysis and visualization capabilities, without the steep learning curve.
 
+![Application](./QuickView-app.png)
+
 ## Key Features
 
 - Intuitive, minimalist interface tailored for atmospheric modeling.