Add documentation for the MCL tutorial (#365)

### 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](https://developercertificate.org/)

---------

Signed-off-by: Alon Druck <alon.druck@ekumenlabs.com>
Signed-off-by: Michel Hidalgo <michel@ekumenlabs.com>
Co-authored-by: Michel Hidalgo <michel@ekumenlabs.com>