Move all files to php/pest/

php/pest/tests/AnagramTest.php

@@ -0,0 +1,14 @@
+<?php
+
+declare(strict_types=1);
+
+use App\Anagram;
+
+it('selects the correct anagrams for a word', function () {
+    $matches = Anagram::forWord(
+        'listen',
+        ['enlists', 'google', 'inlets', 'banana']
+    );
+
+    assertSame(['inlets'], $matches->toArray());
+});