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/laravel/serializable-closure/src/UnsignedSerializableClosure.php

@@ -0,0 +1,82 @@
+<?php
+
+namespace Laravel\SerializableClosure;
+
+use Closure;
+use Laravel\SerializableClosure\Exceptions\PhpVersionNotSupportedException;
+
+class UnsignedSerializableClosure
+{
+    /**
+     * The closure's serializable.
+     *
+     * @var \Laravel\SerializableClosure\Contracts\Serializable
+     */
+    protected $serializable;
+
+    /**
+     * Creates a new serializable closure instance.
+     *
+     * @param  \Closure  $closure
+     * @return void
+     */
+    public function __construct(Closure $closure)
+    {
+        if (\PHP_VERSION_ID < 70400) {
+            throw new PhpVersionNotSupportedException();
+        }
+
+        $this->serializable = new Serializers\Native($closure);
+    }
+
+    /**
+     * Resolve the closure with the given arguments.
+     *
+     * @return mixed
+     */
+    public function __invoke()
+    {
+        if (\PHP_VERSION_ID < 70400) {
+            throw new PhpVersionNotSupportedException();
+        }
+
+        return call_user_func_array($this->serializable, func_get_args());
+    }
+
+    /**
+     * Gets the closure.
+     *
+     * @return \Closure
+     */
+    public function getClosure()
+    {
+        if (\PHP_VERSION_ID < 70400) {
+            throw new PhpVersionNotSupportedException();
+        }
+
+        return $this->serializable->getClosure();
+    }
+
+    /**
+     * Get the serializable representation of the closure.
+     *
+     * @return array
+     */
+    public function __serialize()
+    {
+        return [
+            'serializable' => $this->serializable,
+        ];
+    }
+
+    /**
+     * Restore the closure after serialization.
+     *
+     * @param  array  $data
+     * @return void
+     */
+    public function __unserialize($data)
+    {
+        $this->serializable = $data['serializable'];
+    }
+}