Create rules for controller detection

According to the [migration guide](https://github.com/spring-projects/spring-framework/wiki/Upgrading-to-Spring-Framework-6.x#web-applications-2):

> Spring MVC and Spring WebFlux no longer detect controllers based solely on a type-level @RequestMapping annotation. That means interface-based AOP proxying for web controllers may no longer work. Please, enable class-based proxying for such controllers; otherwise the interface must also be annotated with @Controller. See [22154](https://github.com/spring-projects/spring-framework/issues/22154).

Investigate and create rules if necessary.

In the rule description and message, try to be as verbose and clear as possible. Code examples are always welcome and useful. Feel free to use markdown syntax for these.