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

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

vendor/symfony/string/Slugger/SluggerInterface.php

@@ -0,0 +1,27 @@
+<?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\String\Slugger;
+
+use Symfony\Component\String\AbstractUnicodeString;
+
+/**
+ * Creates a URL-friendly slug from a given string.
+ *
+ * @author Titouan Galopin <galopintitouan@gmail.com>
+ */
+interface SluggerInterface
+{
+    /**
+     * Creates a slug for the given string and locale, using appropriate transliteration when needed.
+     */
+    public function slug(string $string, string $separator = '-', ?string $locale = null): AbstractUnicodeString;
+}