refactor: add use statements to resolve classes in PHPDoc

Author: kenjis

system/Common.php

@@ -9,14 +9,18 @@
  * file that was distributed with this source code.
  */
 
+use CodeIgniter\Cache\CacheInterface;
 use CodeIgniter\Config\Factories;
 use CodeIgniter\Database\BaseConnection;
 use CodeIgniter\Database\ConnectionInterface;
+use CodeIgniter\Debug\Timer;
 use CodeIgniter\Files\Exceptions\FileNotFoundException;
+use CodeIgniter\HTTP\Exceptions\HTTPException;
 use CodeIgniter\HTTP\RedirectResponse;
 use CodeIgniter\HTTP\RequestInterface;
 use CodeIgniter\HTTP\ResponseInterface;
 use CodeIgniter\HTTP\URI;
+use CodeIgniter\Session\Session;
 use CodeIgniter\Test\TestLogger;
 use Config\App;
 use Config\Database;