Migration guide for 3.0

[sergey-morenets]

Hi

We used Eclipse Soteria in our project and after migration to 3.0 (Jakarta EE 10) our project failed to compile because these public methods where removed:

import static org.glassfish.soteria.mechanisms.jaspic.Jaspic.deregisterServerAuthModule;
import static org.glassfish.soteria.mechanisms.jaspic.Jaspic.registerServerAuthModule;

We couldn't find any hints in the documentation how to handle that so we had to deep dive into the source code and find out about AuthConfigFactory and their usage.
So it would be nice to create a section in README to explain how to deal with these issues during migration.