added class to control exceptions

src/main/java/nce/integration/synergy/exception/ApiException.java

-package kz.neos.arc.exception;
+package nce.integration.synergy.exception;
 
 import lombok.Data;
 import org.springframework.http.HttpStatus;

src/main/java/nce/integration/synergy/exception/ApiExceptionHandler.java

-package kz.neos.arc.exception;
+package nce.integration.synergy.exception;
 
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;

src/main/java/nce/integration/synergy/exception/ApiRequestException.java

-package kz.neos.arc.exception;
+package nce.integration.synergy.exception;
 
 public class ApiRequestException extends RuntimeException {
     public ApiRequestException(String message) {

src/main/java/nce/integration/synergy/exception/SampleException.java

-package kz.neos.arc.exception;
+package nce.integration.synergy.exception;
 
 /**
  * Author: Khazretsultan Zhiyentayev