docs(new-tutorial): add essentials/unit-0

[aliemir]

Refine essentials / unit 0 for the new tutorial. includes a brief intro to Refine's data hooks, form handling and tables.

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Latest commit: 3ac81f28d3f38df9bc097412819e04f5bf4d9fde

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✅ Successfully ran 2 targets

• lerna run test --stream --scope @refinedev/* --scope create-refine-app
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[necatiozmen]

Excellent work! 🥇

I have few questions.

"This tutorial will walk you through from essentials of Refine to advanced topics. You'll learn how to build a full-featured CRUD applications with Refine."

'This tutorial will walk you through' => 'This part named "essentials" of the tutorial will walk you through...'

Because I guess we are talking about that we have 1 tutorial and the specific parts of the tutorial. Each unit has its own introduction, so we don't need to say 'this tutorial' for each units like authentication, routing...

Or we'll call each part its own tutorial, like 'authentication tutorial,' 'routing tutorial'?

Should give an overview of what steps will be taken in the each of the tutorial? Something like: 'We'll show the implementation of essential concepts like fetching, updating, listing records, and using forms and tables...'" in this tutorial sections..