[BUGFIX] Add `config.frontend_editing` to tsref.xml of EXT:t3editor

Resolves: #79736
Releases: master
Change-Id: I8662c7adfa38669b3a66b3959485722a285b4448
Reviewed-on: https://review.typo3.org/51622


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Benni Mack <benni@typo3.org>
Tested-by: Benni Mack <benni@typo3.org>