[DOCS] Styling needs to be more accessible for Python users

[AlexandreSajus]

Issue Description

Most of the support requests we get from Enterprise customers are about styling. They either don't know or don't want to learn how to style in Taipy. A tutorial should clearly explain how to change colors, fonts, sizes, and layouts of visual elements. This tutorial should explain how we style applications by inspecting the page, applying CSS directly in the browser, and then creating a .css file to apply the style.

Code of Conduct

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