[Security] Implement stateless headers/cookies-based CSRF protection

[nicolas-grekas]

Q	A
Feature PR	symfony/symfony#58095
PR author(s)	@nicolas-grekas
Merged in	7.2

We created this issue to not forget to document this new feature. We would really appreciate if you can help us with this task. If you are not sure how to do it, please ask us and we will help you.

To fix this issue, please create a PR against the 7.2 branch in the symfony-docs repository.

Thank you! 😃

[javiereguiluz]

@nicolas-grekas if you have some time, please try to send a PR for this. I feel like this is important and you are the one who understands this best. Thanks!