Added toString() to print Professor Information

src/main/java/org/example/Professor.java

@@ -37,4 +37,13 @@ public class Professor {
     public void setRole(String role) {
         this.role = role;
     }
+
+    @Override
+    public String toString() {
+        return "Professor{" +
+                "professorID='" + professorID + '\'' +
+                ", Name='" + Name + '\'' +
+                ", role='" + role + '\'' +
+                '}';
+    }
 }