Draft: Add tutorial walkthrough

What does this MR do and why?

Drafting a walkthrough for the tutorials landing page.

Companion MR in gitlab project: gitlab-org/gitlab!197921 (closed)

Screenshots, screen recordings, or links to review app

These are strongly recommended to assist reviewers and reduce the time to merge your change.

How to set up and validate locally

Numbered steps to set up and validate the change are strongly suggested.

  1. Configure a local GitLab Docs environment.
  2. Check out this branch.

Merge request acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

Edited by Kati Paizee

Merge request reports

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