DX: bootstrap rector

rector.php

@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+use Rector\CodeQuality\Rector\Class_\InlineConstructorDefaultToPropertyRector;
+use Rector\Config\RectorConfig;
+use Rector\Set\ValueObject\LevelSetList;
+
+return static function (RectorConfig $rectorConfig): void {
+    $rectorConfig->paths([
+        __DIR__ . '/docs',
+        __DIR__ . '/src',
+    ]);
+
+    $rectorConfig->cacheClass(\Rector\Caching\ValueObject\Storage\FileCacheStorage::class);
+    $rectorConfig->cacheDirectory(__DIR__.'/.cache/rector');
+
+    // register a single rule
+    $rectorConfig->rule(InlineConstructorDefaultToPropertyRector::class);
+
+    // define sets of rules
+    //    $rectorConfig->sets([
+    //        LevelSetList::UP_TO_PHP_74
+    //    ]);
+};