Adding addCourse method in Course class

src/main/java/org/example/Course.java

@@ -146,5 +146,9 @@ public class Course {
         return courses;
     }
 
-
+    public static void addCourse(String courseName, String courseCode, int courseCredit, String filename) {
+        // Write course data to the file
+        Course course = new Course();
+        course.writeToFile(courseName, courseCode, courseCredit, filename);
+    }
 }