[TASK] Re-add autolinking RTE feature in CKeditor

A missing functionality is added, which happened when introducing CKeditor.

Automatically linking a URL when typing www.typo3.org should happen directly.

A specific plugin is used for that. Base concept was taken from
https://github.com/Gnodiah/ckeditor-autolink

Resolves: #80977
Releases: master, 8.7
Change-Id: I575b63eeb696166b5e3b06047106e26cb68eb7b4
Reviewed-on: https://review.typo3.org/54611


Tested-by: TYPO3com <no-reply@typo3.com>
Reviewed-by: Sebastian Hofer <sebastian.hofer@marit.ag>
Tested-by: Sebastian Hofer <sebastian.hofer@marit.ag>
Tested-by: Riccardo De Contardi <erredeco@gmail.com>
Reviewed-by: Susanne Moog <susanne.moog@typo3.org>
Tested-by: Susanne Moog <susanne.moog@typo3.org>