add e2e status icon to readme

Author: NiloCK

readme.md

@@ -1,7 +1,10 @@
+![E2E Tests](https://github.com/yourusername/vue-skuilder/actions/workflows/e2e-tests.yml/badge.svg)
+
 [![image](https://user-images.githubusercontent.com/10780590/132559883-8d65a1ef-d930-468b-8805-7e1003e05c7d.png)](https://www.youtube.com/watch?v=a6tvHMvF8Mo)
 
 An experiment in mass-collaborative authoring of general, intelligent tutoring systems.
 
+
 # Usage
 
 ## Installation