📍Use lombok, reformat, and optimize the code (#1560)

* Use lombok, reformat, and optimize the code

* Fix merge conflicts and some sonar issues

Co-authored-by: va1m <va1m@email.com>

state/README.md

@@ -48,10 +48,9 @@ public interface State {
   void observe();
 }
 
+@Slf4j
 public class PeacefulState implements State {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(PeacefulState.class);
-
   private final Mammoth mammoth;
 
   public PeacefulState(Mammoth mammoth) {
@@ -69,10 +68,9 @@ public class PeacefulState implements State {
   }
 }
 
+@Slf4j
 public class AngryState implements State {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(AngryState.class);
-
   private final Mammoth mammoth;
 
   public AngryState(Mammoth mammoth) {