feat: assignments in courses

[pateljannat]

1. Assignments are now a first-class feature in the LMS.
2. Moderators can now track all the assignments from the portal.
3. The sidebar now has a link to the assignments page which shows all assignments. The list can be filtered by title or type.
4. Moderators can create new assignments from here or edit existing assignments.
5. The form for each assignment leads you to the submission list of that assignment. This list can be filtered based on assignment, member, and status.
6. Clicking on a submission will show them the work done by the student. They can then change the submission status and add their comments that will be visible to students.
7. Whenever there is an update on the status or the comments of the submission, the student gets notified about the same.
8. Moderators can now also add assignments to courses.

Students Perspective

studentAssignment.mp4

Moderators Perspective

moderatorAssignment.mp4

Students perspective after the assignment has been graded

Notification to student:

[cypress]

lms    Run #942

Run Properties:   Passed #942  •  7fb3550edd ℹ️: Merge eeb7fb1f78f5b76b2063c41f51d9147fdcf288c0 into 12019ca37d4472a7c14bd129d1ad...

Project	lms
Branch Review	assignments-in-courses
Run status	Passed #942
Run duration	00m 29s
Commit	7fb3550edd ℹ️: Merge eeb7fb1f78f5b76b2063c41f51d9147fdcf288c0 into 12019ca37d4472a7c14bd129d1ad...
Committer	Jannat Patel
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[frappe-pr-bot]

🎉 This PR is included in version 2.18.0 🎉

The release is available on GitHub release

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