refactor: modernize PHPUnit bootstrap file with strict types and improved path handling

Author: nanoninja

web/app/tests/bootstrap.php

@@ -0,0 +1,16 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * Bootstrap file for PHPUnit tests
+ */
+
+// Set error reporting to the maximum level
+error_reporting(E_ALL);
+
+// Include the Composer autoloader
+require_once dirname(__DIR__) . '/vendor/autoload.php';
+
+// Configure additional test environment settings if needed
+// date_default_timezone_set('UTC');