feat(bid): add pending delivery order management feature

1. 新增待发订单路由页面与菜单权限
2. 新增发货单生成功能，可从已采纳报价单创建发货单
3. 扩展发货单实体与Mapper，增加物料数量统计字段
4. 实现待发订单列表、详情、编辑、发货确认与删除功能

ruoyi-system/src/main/resources/mapper/bid/BizDeliveryOrderMapper.xml

@@ -22,10 +22,12 @@
     <result property="updateBy" column="update_by"/>
     <result property="updateTime" column="update_time"/>
     <result property="supplierName" column="supplier_name"/>
+    <result property="itemCount" column="item_count"/>
   </resultMap>
 
   <select id="selectBizDeliveryOrderList" resultMap="BaseRM">
-    SELECT d.*, s.supplier_name
+    SELECT d.*, s.supplier_name,
+      (SELECT COUNT(*) FROM biz_delivery_order_item WHERE do_id = d.do_id) AS item_count
     FROM biz_delivery_order d
     LEFT JOIN biz_supplier s ON d.supplier_id=s.supplier_id
     <where>