chore: Add empty rector configuration

Only applying on apps for now, and only minimal type coverage level.

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

rector.php

@@ -0,0 +1,25 @@
+<?php
+
+declare(strict_types=1);
+
+/**
+ * SPDX-FileCopyrightText: 2024 Nextcloud GmbH and Nextcloud contributors
+ * SPDX-License-Identifier: AGPL-3.0-only
+ */
+
+use Rector\Config\RectorConfig;
+
+return RectorConfig::configure()
+	->withPaths([
+		__DIR__ . '/apps',
+		// __DIR__ . '/config',
+		// __DIR__ . '/core',
+		// __DIR__ . '/lib',
+		// __DIR__ . '/ocs',
+		// __DIR__ . '/ocs-provider',
+		// __DIR__ . '/tests',
+		// __DIR__ . '/themes',
+	])
+	// uncomment to reach your current PHP version
+	// ->withPhpSets()
+	->withTypeCoverageLevel(0);

vendor-bin/rector/composer.json

@@ -0,0 +1,6 @@
+{
+    "require-dev": {
+        "rector/rector": "^1.2",
+        "nextcloud/rector": "^0.2.0"
+    }
+}