add-css-and-js.php
<?php
$res = \Lia\Addon\Resources::from($lia);
$res->addFile(dirname(__DIR__).'/file/test.css');
$res->addFile(dirname(__DIR__).'/file/test2.css');
$res->addFile(dirname(__DIR__).'/file/test.js');
$res->addFile(dirname(__DIR__).'/file/test2.js');
$res->addURL('/some-url.css');
$res->addURL('/some-url.js');
$res->addURL('/some-url2.css');
$res->addURL('/some-url2.js');
echo "sample content";