Added Project structure, API, Frontend and Websockets

api/vendor/symfony/translation/Exception/MissingRequiredOptionException.php

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+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <[email protected]>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Component\Translation\Exception;
+
+/**
+ * @author Oskar Stark <[email protected]>
+ */
+class MissingRequiredOptionException extends IncompleteDsnException
+{
+    public function __construct(string $option, ?string $dsn = null, ?\Throwable $previous = null)
+    {
+        $message = \sprintf('The option "%s" is required but missing.', $option);
+
+        parent::__construct($message, $dsn, $previous);
+    }
+}