Integrate Coursepathfinder API for workspace reordering

[stefankreitmayer]

As a user When I see my workspace In order to reflect on my learning path I want the system to suggest an alternative sequence

Tasks

• [x] enable course feature for all logged-in users
• [x] call Nantes API to get new sequence
• [x] if the new sequence differs, provide a message and an undo button
• [x] if the new sequence is the same, provide a message