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/UnreadableFileEncountered.php

@@ -0,0 +1,28 @@
+<?php
+
+declare(strict_types=1);
+
+namespace League\Flysystem;
+
+use RuntimeException;
+
+final class UnreadableFileEncountered extends RuntimeException implements FilesystemException
+{
+    /**
+     * @var string
+     */
+    private $location;
+
+    public function location(): string
+    {
+        return $this->location;
+    }
+
+    public static function atLocation(string $location): UnreadableFileEncountered
+    {
+        $e = new static("Unreadable file encountered at location {$location}.");
+        $e->location = $location;
+
+        return $e;
+    }
+}