Create Data Version Control tutorial materials

[kivancic-ut]

Where to put new files:

• New files should go into a top-level subfolder, named after the article slug. For example: my-awesome-article

How to merge your changes:

1. Make sure the CI code style tests all pass (+ run the automatic code formatter if necessary).
2. Find an RP Team member on Slack and ask them to review & approve your PR.
3. Once the PR has one positive ("approved") review, GitHub lets you merge the PR.
4. 🎉

[somacdivad]

Hi @KristijanIvancic!

I've left you some feedback on the code. For the most part everything is good, I just have a few suggestions to clean a few things up and maybe simplify a few lines.

Let me know what you think!

[somacdivad]

@KristijanIvancic I've approved the PR. No need to merge it or anything. An editor will take care of that before the article goes live!