[TASK] Restructuring of TCA, ext_tables and ext_localconf

Classes/Hooks/PageLayoutController.php

Classes/Utility/BackendNewsUtility.php

Classes/Utility/VersionUtility.php

Configuration/TCA/Overrides/pages.php

Configuration/TCA/Overrides/pages_language_overlay.php

Configuration/TCA/Overrides/sys_template.php

Configuration/TCA/Overrides/tt_content.php

Configuration/TypoScript/Common/setup.typoscript

Configuration/TypoScript/Frontend/constants.typoscript

Configuration/TypoScript/Frontend/setup.typoscript

Resources/Public/JavaScript/Backend.js

ext_localconf.php

ext_tables.php