Create a new GET /courses_user endpoint

[kyleecodes]

Overview

To optimize user data loading, introduce a new GET /courses_user endpoint that retrieves session and course data specifically for courses or session pages. This means we can remove courses and user data from the profile.

This issue is not blocked, but ideally #717 should be completed first.

Action Items

• Create a new GET /courses_user endpoint in the backend.
• Implement the getCourseUserByUserId service method for this endpoint.
• Write backend tests to ensure proper functionality (alternatively, this can be made into a separate issue.)
• Add a new controller file for handling this endpoint.
• Include code comments.

[csehatt741]

@kyleecodes, I`m also happy to help here.

[github-actions]

Thank you @csehatt741 you have been assigned this issue!
Please follow the directions in our Contributing Guide. We look forward to reviewing your pull request. ✨

---

Support Chayn's mission? ⭐ Please star this repo to help us find more contributors like you!
Learn more about our impact and sign-up for our volunteer programsto join our mission!. 🌸