Organize scattered PHP files into scripts/ and tests/ directories

scripts/check_items.php

@@ -0,0 +1,7 @@
+<?php
+require '../vendor/autoload.php';
+require '../config.php';
+ = App\Database\Database::getInstance();
+ = ->query('SELECT id, name FROM items');
+ = ->fetchAll(PDO::FETCH_ASSOC);
+print_r();