add cover image

Author: Lukas Pistrol

README.md

@@ -14,6 +14,8 @@
 
  CodeEditKit is a dynamic library which is shared between CodeEdit and it's extensions. It allows them to communicate with and understand one another.
 
+<img width="1012" alt="github-cover-CodeEditKit" src="https://user-images.githubusercontent.com/9460130/194028678-dc985fa0-ccb9-4a6b-8d16-0185e10aed8d.png">
+
 ## License
 
 Licensed under the [MIT license](https://github.com/CodeEditApp/CodeEdit/blob/main/LICENSE.md).