📍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>

data-mapper/src/test/java/com/iluwatar/datamapper/DataMapperTest.java

@@ -37,13 +37,13 @@ import org.junit.jupiter.api.Test;
  * Data Mapper itself is even unknown to the domain layer.
  * <p>
  */
-public class DataMapperTest {
+class DataMapperTest {
 
   /**
    * This test verify that first data mapper is able to perform all CRUD operations on Student
    */
   @Test
-  public void testFirstDataMapper() {
+  void testFirstDataMapper() {
 
     /* Create new data mapper of first type */
     final var mapper = new StudentDataMapperImpl();