[FEATURE] Add community ext in the Plugins Tab in the New content element dialog

Change-Id: If400c8f6eecc26113a814c49b85d4a5b1eff8f29
Resolves: #34294
Reviewed-on: https://review.typo3.org/24844
Reviewed-by: Simon Schaufelberger
Tested-by: Simon Schaufelberger