📍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>

command/README.md

@@ -39,6 +39,7 @@ Wikipedia says
 Here's the sample code with wizard and goblin. Let's start from the `Wizard` class.
 
 ```java
+@Slf4j
 public class Wizard {
 
   private final Deque<Command> undoStack = new LinkedList<>();
@@ -77,10 +78,9 @@ public class Wizard {
 Next, we have the goblin who's the target of the spells.
 
 ```java
+@Slf4j
 public abstract class Target {
 
-  private static final Logger LOGGER = LoggerFactory.getLogger(Target.class);
-
   private Size size;
 
   private Visibility visibility;