[DOCS] Add tutorial section to documentation

[rintisch]

The documentation of EXT:news contains tutorials, see https://docs.typo3.org/p/georgringer/news/main/en-us/Tutorials/Index.html

This is a good way to include pratical guiding for developers/integrators without polluting the more technical parts of the documentation.

For the beginning the following guides can be implemented:

• How to integrate the MiniCart in a page.
  • See https://github.com/extcode/cart_products/issues/93#issuecomment-2154891352
• How to add an EventListener to render images of products in the cart product list.
• How to set up multistep with proper routing.
• How to prefill checkout with FE user data.