feat: 支付功能迁移（初稿）

src/api/pay/demo/index.ts

@@ -0,0 +1,36 @@
+import request from '@/config/axios'
+
+export interface DemoOrderVO {
+  spuId: number
+  createTime: Date
+}
+
+// 创建示例订单
+export function createDemoOrder(data: DemoOrderVO) {
+  return request.post({
+    url: '/pay/demo-order/create',
+    data: data
+  })
+}
+
+// 获得示例订单
+export function getDemoOrder(id: number) {
+  return request.get({
+    url: '/pay/demo-order/get?id=' + id
+  })
+}
+
+// 获得示例订单分页
+export function getDemoOrderPage(query: PageParam) {
+  return request.get({
+    url: '/pay/demo-order/page',
+    params: query
+  })
+}
+
+// 退款示例订单
+export function refundDemoOrder(id) {
+  return request.put({
+    url: '/pay/demo-order/refund?id=' + id
+  })
+}