init

- 框架初始化
 - 安装插件
 - 修复PHP8.4报错

addons/epay/library/v2/Yansongda/Pay/Gateways/Alipay/RefundGateway.php

@@ -0,0 +1,21 @@
+<?php
+
+namespace Yansongda\Pay\Gateways\Alipay;
+
+class RefundGateway
+{
+    /**
+     * Find.
+     *
+     * @author yansongda <me@yansongda.cn>
+     *
+     * @param $order
+     */
+    public function find($order): array
+    {
+        return [
+            'method' => 'alipay.trade.fastpay.refund.query',
+            'biz_content' => json_encode(is_array($order) ? $order : ['out_trade_no' => $order]),
+        ];
+    }
+}