refactor: banner新增相关分类数据字段

app/common/model/SysBannerProdCateMappingBaseModel.php

@@ -0,0 +1,22 @@
+<?php
+declare (strict_types = 1);
+
+namespace app\common\model;
+
+use think\Model;
+
+/**
+ * banner与产品分类关联表模型
+ * @mixin \think\Model
+ */
+class SysBannerProdCateMappingBaseModel extends Model
+{
+    // 表名
+    protected $name = 'sys_banner_prod_cate_mapping';
+
+    // 字段信息
+    protected $schema = [
+        'banner_item_id'      => 'int',
+        'product_category_id' => 'int',
+    ];
+}