Added calculateTotalCredits Method in Student class

src/main/java/org/example/Student.java

@@ -120,4 +120,12 @@ public class Student {
         }
     }
 
+    public int calculateTotalCredits() {
+        int totalCredits = 0;
+        for (Course course : courseGrades.keySet()) {
+            totalCredits += course.getCourseCredits();
+        }
+        return totalCredits;
+    }
+
 }