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/league/flysystem/src/UnableToWriteFile.php

@@ -0,0 +1,45 @@
+<?php
+
+declare(strict_types=1);
+
+namespace League\Flysystem;
+
+use RuntimeException;
+use Throwable;
+
+final class UnableToWriteFile extends RuntimeException implements FilesystemOperationFailed
+{
+    /**
+     * @var string
+     */
+    private $location = '';
+
+    /**
+     * @var string
+     */
+    private $reason;
+
+    public static function atLocation(string $location, string $reason = '', ?Throwable $previous = null): UnableToWriteFile
+    {
+        $e = new static(rtrim("Unable to write file at location: {$location}. {$reason}"), 0, $previous);
+        $e->location = $location;
+        $e->reason = $reason;
+
+        return $e;
+    }
+
+    public function operation(): string
+    {
+        return FilesystemOperationFailed::OPERATION_WRITE;
+    }
+
+    public function reason(): string
+    {
+        return $this->reason;
+    }
+
+    public function location(): string
+    {
+        return $this->location;
+    }
+}