Suggestion for modules' web pages: Add a hint to all methods of a certain trait

It would be nice to have way to somehow add a hint to some trait (e.g. https://github.com/Codeception/module-symfony/blob/main/src/Codeception/Module/Symfony/SecurityAssertionsTrait.php), and then have this hint displayed at all methods of that trait (e.g. https://codeception.com/docs/modules/Symfony#dontSeeAuthentication).

Background: That security trait requires Symfony's `security.helper` service to be declared `public`, see https://github.com/Codeception/module-symfony/issues/138, and there might be more use cases in the future where something has to be explained for an entire trait.

@Naktibalda what do you think?