chore(docs): adding video tutorial/introduction to macOS codesigning and notarization

[mmaietta]

Thank you @Chetan11-dev for putting this together!

Please review and see if there's any additional content/documentation you would like added.

Implements: #8621

[mmaietta]

CC @beyondkmp in case you also have thoughts on improvements to the code-signing documentation. Happy to add more content

[Chetan11-dev]

If possible could you remove
"Props to @Chetan11-dev for putting this together!"
I did to help people, I don't need the credit.

[changeset-bot]

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Latest commit: 2aa8214

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