Add support for PSR-7 response

Author: jakubboucek

composer.json

@@ -10,7 +10,8 @@
         }
     ],
     "require": {
-        "php": "^8.2"
+        "php": "^8.2",
+        "psr/http-message": "^1.0 || ^2.0"
     },
     "require-dev": {
         "phpstan/phpstan": "1.10.33"

src/Response/Psr7Response.php

@@ -0,0 +1,26 @@
+<?php
+
+declare(strict_types=1);
+
+namespace JakubBoucek\OpenWhisk\Runtime\Response;
+
+use Psr\Http\Message\ResponseInterface;
+
+class Psr7Response implements Response
+{
+    private ResponseInterface $response;
+
+    public function __construct(ResponseInterface $response)
+    {
+        $this->response = $response;
+    }
+
+    public function getArrayCopy(): array
+    {
+        return [
+            self::BodyKey => (string)$this->response->getBody(),
+            self::StatusCodeKey => $this->response->getStatusCode(),
+            self::HeadersKey => $this->response->getHeaders()
+        ];
+    }
+}