Fix bin/publish: copy docs.dist from project root

Fix bin/publish: use correct .env path for rspade_system
Fix bin/publish script: prevent grep exit code 1 from terminating script

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

vendor/symfony/http-kernel/Exception/HttpException.php

@@ -0,0 +1,49 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\HttpKernel\Exception;
+
+/**
+ * HttpException.
+ *
+ * @author Kris Wallsmith <kris@symfony.com>
+ */
+class HttpException extends \RuntimeException implements HttpExceptionInterface
+{
+    private int $statusCode;
+    private array $headers;
+
+    public function __construct(int $statusCode, string $message = '', ?\Throwable $previous = null, array $headers = [], int $code = 0)
+    {
+        $this->statusCode = $statusCode;
+        $this->headers = $headers;
+
+        parent::__construct($message, $code, $previous);
+    }
+
+    public function getStatusCode(): int
+    {
+        return $this->statusCode;
+    }
+
+    public function getHeaders(): array
+    {
+        return $this->headers;
+    }
+
+    /**
+     * @return void
+     */
+    public function setHeaders(array $headers)
+    {
+        $this->headers = $headers;
+    }
+}