[TASK] Use @import instead of INCLUDE_TYPOSCRIPT

ext_localconf.php

@@ -34,7 +34,7 @@ call_user_func(
 
 		if (TYPO3_MODE === 'BE') {
 			\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::addTypoScriptSetup(
-				'<INCLUDE_TYPOSCRIPT: source="FILE:EXT:' . $extKey . '/Configuration/TypoScript/setup.typoscript">'
+				'@import "EXT:' . $extKey . '/Configuration/TypoScript/setup.typoscript"'
 			);
 		}