readd implementation folder

implementation/08/src/Action/Hello.php

@@ -0,0 +1,25 @@
+<?php declare(strict_types=1);
+
+namespace Lubian\NoFramework\Action;
+
+use Psr\Http\Message\ResponseInterface;
+use Psr\Http\Message\ServerRequestInterface;
+use Psr\Http\Server\RequestHandlerInterface;
+
+final class Hello implements RequestHandlerInterface
+{
+    public function __construct(private readonly ResponseInterface $response)
+    {
+    }
+
+    public function handle(ServerRequestInterface $request): ResponseInterface
+    {
+        $name = $request->getAttribute('name', 'Stranger');
+        $body = $this->response->getBody();
+
+        $body->write('Hello ' . $name . '!');
+
+        return $this->response->withBody($body)
+            ->withStatus(200);
+    }
+}