add doctor command

src/SPC/doctor/item/OSCheckList.php

@@ -0,0 +1,23 @@
+<?php
+
+declare(strict_types=1);
+
+namespace SPC\doctor\item;
+
+use SPC\builder\traits\UnixSystemUtilTrait;
+use SPC\doctor\AsCheckItem;
+use SPC\doctor\CheckResult;
+
+class OSCheckList
+{
+    use UnixSystemUtilTrait;
+
+    #[AsCheckItem('if current os are supported', level: 999)]
+    public function checkOS(): ?CheckResult
+    {
+        if (!in_array(PHP_OS_FAMILY, ['Darwin', 'Linux'])) {
+            return CheckResult::fail('Current OS is not supported');
+        }
+        return CheckResult::ok();
+    }
+}