[TASK][!!!] Update code to PHP 8 and add compatibility with TYPO3 12 LTS

ext_localconf.php

@@ -1,6 +1,6 @@
 <?php
 
-defined('TYPO3_MODE') or die();
+defined('TYPO3') or die();
 
 // Define state cache, if not already defined
 if (!is_array($GLOBALS['TYPO3_CONF_VARS']['SYS']['caching']['cacheConfigurations']['geocoding'] ?? false)) {