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/phar-io/manifest/src/values/Url.php

@@ -0,0 +1,38 @@
+<?php declare(strict_types = 1);
+/*
+ * This file is part of PharIo\Manifest.
+ *
+ * Copyright (c) Arne Blankerts <arne@blankerts.de>, Sebastian Heuer <sebastian@phpeople.de>, Sebastian Bergmann <sebastian@phpunit.de> and contributors
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ *
+ */
+namespace PharIo\Manifest;
+
+use const FILTER_VALIDATE_URL;
+use function filter_var;
+
+class Url {
+    /** @var string */
+    private $url;
+
+    public function __construct(string $url) {
+        $this->ensureUrlIsValid($url);
+
+        $this->url = $url;
+    }
+
+    public function asString(): string {
+        return $this->url;
+    }
+
+    /**
+     * @throws InvalidUrlException
+     */
+    private function ensureUrlIsValid(string $url): void {
+        if (filter_var($url, FILTER_VALIDATE_URL) === false) {
+            throw new InvalidUrlException;
+        }
+    }
+}