chore: Add default Testo config

Author: roxblnfk

testo.php

@@ -0,0 +1,17 @@
+<?php
+
+declare(strict_types=1);
+
+use Testo\Config\ApplicationConfig;
+use Testo\Config\SuiteConfig;
+
+return new ApplicationConfig(
+    suites: [
+        new SuiteConfig(
+            name: 'default',
+            location: new \Testo\Config\FinderConfig(
+                include: ['tests/Testo'],
+            ),
+        ),
+    ],
+);