add course registration starter code

src/CourseRegistrationStarter/RegistrationSystem.java

@@ -0,0 +1,24 @@
+package CourseRegistrationStarter;
+import java.util.ArrayList;
+
+public class RegistrationSystem {
+    private ArrayList<Course> courses;
+
+    public RegistrationSystem() {
+        courses = new ArrayList<>();
+    }
+
+    public void addCourseToSystem(Course c) {
+        // TODO: Add the course to the system
+    }
+
+    public Course findCourseByCode(String code) {
+        // TODO: Search for a course by course code
+        // Return the matching course if found, otherwise return null
+        return null;
+    }
+
+    public void showAllCourses() {
+        // TODO: Print all courses in the system
+    }
+}