init

- 框架初始化
 - 安装插件
 - 修复PHP8.4报错

addons/epay/library/v3/Yansongda/Pay/Contract/PluginInterface.php

@@ -0,0 +1,13 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Yansongda\Pay\Contract;
+
+use Closure;
+use Yansongda\Pay\Rocket;
+
+interface PluginInterface
+{
+    public function assembly(Rocket $rocket, Closure $next): Rocket;
+}