Added basic API endpoints (#258)

src/API/NotFoundException.php

@@ -0,0 +1,22 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\API;
+
+use Symfony\Component\HttpKernel\Exception\NotFoundHttpException;
+
+class NotFoundException extends NotFoundHttpException
+{
+    public function __construct(string $message = 'Not found', \Exception $previous = null, int $code = 0, array $headers = [])
+    {
+        parent::__construct($message, $previous, $code, $headers);
+    }
+}