Toolbar Management
The user should be able to define different toolbars for the editor which contain different tools.
This is already implemented for CKEditor 4 and needs adaptions for CKEditor 5.
The toolbar for CKE5 is defined here: https://dev.quiqqer.com/quiqqer/ckeditor5/blob/375041aef57a24fbd0ff252e6dabfa320bb35d01/bin/Editor.js#L92-92