add plugin screenshot

README.en.md

@@ -5,6 +5,8 @@
 
 The debug bar enables the display of relevant debug information in the shop frontend.
 
+![screenshot](screenshot.jpg "Screenshot")
+
 ## Table of content
 
 - [Installation](#installation)

README.md

@@ -5,6 +5,8 @@
 
 Die Debug Bar ermöglicht die Darstellung relevanter Debuginformationen im Shopfrontend.
 
+![screenshot](screenshot.jpg "Screenshot")
+
 ## Inhaltsverzeichnis
 
 - [Installation](#installation)

composer.json

@@ -44,7 +44,8 @@
         "composer.json",
         ".php-cs-fixer.php",
         "*.xml",
-        "*.neon"
+        "*.neon",
+        "*.jpg"
       ],
       "target-directory": "d3/debugbar"
     }