Add Get Started tutorials resource

Why is this change being made?

The Technical Writing team recently published Get started with Gitlab tutorials on docs.gitlab.com, and announced it in the docs channel in slack. @ofernandez2 suggested adding as a learning resource to GitLab Learn.

This MR adds the resource to GitLab Learn, and it also adds Technical Writing as a new "Maintainer" to the classification.yml file. This was done following the Handbook steps: Updating content on GitLab Learn.

Author Checklist

• Provided a concise title for the MR
• Added a description to this MR explaining the reasons for the proposed change, per say-why-not-just-what
  • Copy/paste the Slack conversation to document it for later, or upload screenshots. Verify that no confidential data is added.
• Assign reviewers for this change to the correct DRI(s)
  • If the DRI for the page/s being updated isn’t immediately clear, then assign it to one of the people listed in the "Maintained by" section in on the page being edited.
  • If your manager does not have merge rights, please ask someone to merge it AFTER it has been approved by your manager in #mr-buddies.
• If the changes affect team members, or warrant an announcement in another way, please consider posting an update in #whats-happening-at-gitlab linking to this MR.
  • If this is a change that directly impacts the majority of global team members, it should be a candidate for #company-fyi. Please work with internal communications and check the handbook for examples.

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