tests: adds arch tests

tests/Arch.php

@@ -0,0 +1,16 @@
+<?php
+
+use Pest\Expectation;
+
+test('globals')
+    ->expect(['dd', 'dump', 'ray'])
+    ->not->toBeUsed()
+    ->ignoring(Expectation::class);
+
+test('contracts')
+    ->expect('Pest\Contracts')
+    ->toOnlyUse([
+        'NunoMaduro\Collision\Contracts',
+        'Pest\Factories\TestCaseMethodFactory',
+        'Symfony\Component\Console',
+    ]);