created a Walkthrough guide for MLZ.

[tsweatman1]

Description

See linked issue for explanation.

Issue reference

The issue this PR will close: #1040

Checklist

Please make sure you've completed the relevant tasks for this PR out of the following list:

• [x] All acceptance criteria in the backlog item are met
• [x] The documentation is updated to cover any new or changed features
• [x] Manual tests have passed
• [x] Relevant issues are linked to this PR

[jamasten]

Thank you for the contribution, @tsweatman1