feat: temporarily save each response

Author: mychidarko

src/Response.php

@@ -379,6 +379,15 @@ public function send()
     {
         $this->sendHeaders()->sendContent();
 
+        if (class_exists('Leaf\Eien\Server')) {
+            \Leaf\Config::set('response.data', [
+                'headers' => $this->headers,
+                'body' => strpos($this->headers['Content-Disposition'] ?? '', 'attachment') !== false
+                ? readfile($this->content)
+                    : $this->content,
+            ]);
+        }
+
         if (\function_exists('fastcgi_finish_request')) {
             fastcgi_finish_request();
         } elseif (\function_exists('litespeed_finish_request')) {