You can chose whether you want to load the template js and css files or not using the settings $config["includeTemplateCSS"] = true; and $config["includeTemplateJS"] = true;
It is useful when your theme is already loading the bootstrap css and js files so you don't want to load again.
Please note that loading other css and js files can also be set in config file e.g jquery.js etc files.
$settings["includeTemplateCSS"] = false;
$settings["includeTemplateJS"] = false;
$pdocrud = new PDOCrud(false, "","", $settings);
echo $pdocrud->dbTable("orders")->render();