✨(backend) Contract: endpoint list

[rlecellier]

Feature Request

We need to list contract in the teacher dashboard.

This endpoint must implements filters:

• By signatures: 1 or 2 (waiting organization to sign or completed)
• By course
• By organization

This endpoint must return:

• contract_id
• learner_name
• product_title
• nb_signatures (or anything that tell us that it's sign by learner or both learner and organization)

=====

id: string;
  title: string;
  learner_name: string;
  product_title: string;
  sign_date: string;
  course_code: string;
  course_cover: JoanieFile;
}

[samy-aitouakli]

Waiting for PR #358