Add documentation for the MCL tutorial

[Alondruck]

Proposed changes

Related to #305 , split from #340.

Type of change

• [ ] 🐛 Bugfix (change which fixes an issue)
• [ ] 🚀 Feature (change which adds functionality)
• [x] 📚 Documentation (change which fixes or extends documentation)

Checklist

• [x] Lint and unit tests (if any) pass locally with my changes
• [ ] I have added tests that prove my fix is effective or that my feature works
• [x] I have added necessary documentation (if appropriate)
• [x] All commits have been signed for DCO