[TASK] Add sg_ajax as a suggestion

ext_emconf.php

@@ -29,6 +29,7 @@ $EM_CONF[$_EXTKEY] = [
 		'suggests' => [
 			'sg_comments' => '2.1.0-',
 			'rx_shariff' => '5.0.1-',
+			'sg_ajax' => '1.0.6-',
 		],
 	],
 	'suggests' => [],

ext_localconf.php

@@ -63,10 +63,12 @@ $tsPath = $extPath . 'Configuration/TypoScript/Common/';
 	['PageBrowser' => '',]
 );
 
-\SGalinski\SgAjax\Service\AjaxRegistration::configureAjaxFrontendPlugin('sg_news', [
-		'Ajax\Like' => 'addLike',
-	]
-);
+if (\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::isLoaded('sg_ajax')) {
+	\SGalinski\SgAjax\Service\AjaxRegistration::configureAjaxFrontendPlugin('sg_news', [
+			'Ajax\Like' => 'addLike',
+		]
+	);
+}
 
 // hook registration
 $GLOBALS['TYPO3_CONF_VARS']['SC_OPTIONS']['t3lib/class.t3lib_tcemain.php']['processDatamapClass'][] =

ext_tables.php

@@ -138,4 +138,6 @@ $GLOBALS['TCA']['pages']['ctrl']['typeicon_classes'][$customPageDoktype] = 'tcar
 	'options.pageTree.doktypesToShowInNewPageDragArea := addToList(' . $customPageDoktype . ')'
 );
 
-\SGalinski\SgAjax\Service\AjaxRegistration::registerAjaxFrontendPlugin('sg_news');
+if (\TYPO3\CMS\Core\Utility\ExtensionManagementUtility::isLoaded('sg_ajax')) {
+	\SGalinski\SgAjax\Service\AjaxRegistration::registerAjaxFrontendPlugin('sg_news');
+}