Update README.md to include comprehensive documentation for ThinkPHP 8, featuring installation instructions, new features, sponsorship details, and links to resources.

config/middleware.php

@@ -0,0 +1,8 @@
+<?php
+// 中间件配置
+return [
+    // 别名或分组
+    'alias'    => [],
+    // 优先级设置，此数组中的中间件会按照数组中的顺序优先执行
+    'priority' => [],
+];