imp: 租户套餐重名校验

(cherry picked from commit fe404ec233162b87cf1d3be5ea03e5c5f8ff3664)

yudao-module-system/yudao-module-system-api/src/main/java/cn/iocoder/yudao/module/system/enums/ErrorCodeConstants.java

@@ -111,6 +111,7 @@ public interface ErrorCodeConstants {
     ErrorCode TENANT_PACKAGE_NOT_EXISTS = new ErrorCode(1_002_016_000, "租户套餐不存在");
     ErrorCode TENANT_PACKAGE_USED = new ErrorCode(1_002_016_001, "租户正在使用该套餐，请给租户重新设置套餐后再尝试删除");
     ErrorCode TENANT_PACKAGE_DISABLE = new ErrorCode(1_002_016_002, "名字为【{}】的租户套餐已被禁用");
+    ErrorCode TENANT_PACKAGE_NAME_DUPLICATE = new ErrorCode(1_002_016_003, "已经存在该名字的租户套餐");
 
     // ========== 社交用户 1-002-018-000 ==========
     ErrorCode SOCIAL_USER_AUTH_FAILURE = new ErrorCode(1_002_018_000, "社交授权失败，原因是：{}");