chore: update readme add features & screenshot

README.md

@@ -2,7 +2,18 @@
 
 A Django app for user management for makerspaces.
 
+![person overview dashboard](misc/img.png)
 
+
+### Features
+
+- Add and manage users with basic demographic data
+- Configurable introduction courses (optional: mandatory courses)
+- Configurable attributes (e.g. to indicate membership or special knowledge)
+- Configurable booking types with price and interval specification
+- Automatic price calculation based on currently active attributes (e.g. reduced price for different subscription models)
+- Stats (dashboard overview of all bookings, courses, people, etc.)
+
 
 ### Install