Add a basic readme.

Author: alexwilson

README.md

@@ -0,0 +1,8 @@
+# Enable Github Auto-Merge Action
+
+⚠️**WIP: Please wait until version 1.0.0 before using this.** ⚠️
+
+## What is this?
+
+A Github action for enabling [Github Auto-Merge](https://docs.github.com/en/github/collaborating-with-issues-and-pull-requests/automatically-merging-a-pull-request) in a workflow for a pull-request.
+You might want to use this for automatically merge Dependabot pull-requests.