category -> product association implemented

ecomzone/classes/EcomZoneException.php

@@ -0,0 +1,13 @@
+<?php
+if (!defined("_PS_VERSION_")) {
+    exit();
+}
+
+class EcomZoneException extends Exception
+{
+    public const INVALID_PRODUCT_DATA = 1001;
+    public const CATEGORY_CREATE_ERROR = 1002;
+    public const IMAGE_PROCESSING_ERROR = 1003;
+    public const API_ERROR = 1004;
+    public const VALIDATION_ERROR = 1005;
+}