Add: Violator dummy class to test pipeline behaviour

src/main/java/ch/unibas/dmi/dbis/cs108/casono/server/Violator.java

@@ -0,0 +1,7 @@
+package ch.unibas.dmi.dbis.cs108.casono.server;
+
+public class Violator {
+    public void dummy() {
+        System.out.println("This is a disallowed sysout statement, triggering the failure of the merge request");
+    }
+}