TYPO3 Core

The plugin handling is incomplete, and does not remove all related plugins.
CKEditor4 migration is incomplete, it does not set reasonable defaults for
the contentToolbar that are nessesary for CKEditor5.

Solution:
- Handle remove plugins
- Set reasonable defaults in migraton

The plugins `tableProperties` and `tableCellProperties` contain background-colors
and border styling as well as width and height to set tables. These properties
are set as inline styles and cannot be reconfigured as classes.

Stylings for tables like and cells currently cannot be applied since the
currently used style plugin does not allow selecting them when in the context
of a table or a cell.

Possible Solution:
- Remove the `tableProperties` and `tableCellProperties` plugins to avoid inline styles
- Create new toolbar modules to allow setting text alignment and assigning classes to cells and tables.