Added coursesTaught attribute to Professor class

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

@@ -23,9 +23,9 @@ public class Professor {
     // Role of the professor in the system
     public String role;
 
-    /**
-     * Default constructor.
-     */
+    private List<Course> coursesTaught= new ArrayList<>();
+
+
     public Professor() {
     }
 
@@ -40,6 +40,8 @@ public class Professor {
         this.professorID = professorID;
         this.Name = name;
         this.role = role;
+        this.coursesTaught = new ArrayList<>();
+
     }
 
     /**