修改分组管理页面，新增羊只分组页面

src/api/fileManagement/group_management.js

@@ -42,3 +42,11 @@ export function delGroup_management(groupId) {
     method: 'delete'
   })
 }
+
+// 查询所有叶子分组
+export function listLeafGroup() {
+  return request({
+    url: '/group_management/group_management/leaf',
+    method: 'get'
+  })
+}