Spring Security Add initial Native section to reference docs

To make it easier to communicate what is supported in Spring Security and what are the limitations when working with native images, we should add a new section in the reference manual to include information about native support

Comment From: marcusdacoregio

It is not clear yet what should be in there since Spring Boot has good documentation about native already.

Comment From: marcusdacoregio

Reopening this since there is a use case that we should approach in a dedicated native section https://github.com/spring-projects/spring-security/issues/13226