[DOCS] FAQ Section inside the docs

[PKuhlmay]

We should have some kind of FAQ Section within the documentation.
There are often the same questions, which answer you can find deep inside the documentation. It would be nice if we had a FAQ section with all these answers, so the user doesn't have to search all the documentation for it.

[nhovratov]

• How to add partials for frontend / backend previews?
• Is it possible to create containers?
• How to reuse a Collection between multiple Content Elements?
• Can I share fields between multiple Content Elements?
• What are Page Types for?
• How do I render Record Types?
• What are "Basics"?
• I want to prefix all my fields with tx_myextension. Is it possible?
• How to create custom groups for my elements?
• Does Content Blocks work together with Fluid Styled Content?
• Does Content Blocks work without Fluid Styled Content?
• How do I add custom data processing?
• How can I override an existing Content Block?
• Is it possible to add custom Field Types?
• Can I render labels from labels.xlf in the frontend?
• How to add custom CSS / JS
• Do my Content Blocks work for v12 and v13 at the same time?
• How to add custom crop variants?
• How do I define a Plugin with Content Blocks?
• I changed an icon but it's not updated in the backend. What should I do?
• Why are my field labels missing in the user permission settings?
• Is there an auto-completion of YAML for my IDE?
• Which part of Content Blocks is in TYPO3 v13 Core?

[krausandre]

My ideas:

• Can I add PHP code to my content blocks?
• Why yaml and not e.g. JSON or PHP?
• Can I use twig engine with Content Blocks?
• Can I use headless with Content Blocks?
• Are the Content Blocks assets (JS and CSS) compressed by the the core?
• Can I add Content Blocks assets (JS and CSS) to my build process?
• How can I extend an existing Content Block?
• Can I overwrite an existing Content Block?

... [to be continued] ...