I would like to have something like this: vendor --typo3-cms --other-packages cms (vhost-root) --typo3_src -> ../typo3-cms --index.php -> typo3_src/typo3 --typo3 -> typo3_src/typo3 without index.php, typo3_src, typo3 in root.... Is it explicitly NOT supposed to be installed that way?