Add limited backoffice functionality with employee management and department pricing

services/nginx/app/classes/limited_backoffice_exception.php

@@ -0,0 +1,24 @@
+<?php
+
+namespace classes;
+
+class limited_backoffice_exception extends \RuntimeException
+{
+    public function __construct(
+        string $message,
+        private readonly int $statusCode = 400,
+        private readonly ?array $payload = null
+    ) {
+        parent::__construct($message);
+    }
+
+    public function statusCode(): int
+    {
+        return $this->statusCode;
+    }
+
+    public function payload(): array|string
+    {
+        return $this->payload ?? $this->getMessage();
+    }
+}