feat(tenant-balance): 新增租户余额管理功能

新增租户余额实体、Mapper、Service及Admin接口，支持余额CRUD与分页查询；
补充租户余额不存在错误码，优化TenantPackageMapper代码格式。

yolo-module-system/src/main/java/com/yolo/keyboard/module/system/dal/mysql/tenant/TenantPackageMapper.java

@@ -17,7 +17,6 @@ public interface TenantPackageMapper extends BaseMapperX<TenantPackageDO> {
                 .likeIfPresent(TenantPackageDO::getName, reqVO.getName())
                 .eqIfPresent(TenantPackageDO::getStatus, reqVO.getStatus())
                 .likeIfPresent(TenantPackageDO::getRemark, reqVO.getRemark())
-                .betweenIfPresent(TenantPackageDO::getCreateTime, reqVO.getCreateTime())
                 .orderByDesc(TenantPackageDO::getId));
     }