Add ckeditor5-stylesheets config

here is the initial attempt with just the info.yml file change

I changed the patch to add the ckeditor5-stylesheets section to before the ckeditor_stylesheets section, as the patch with it after from comment #6 worked fine applying to the Git repository, but it would fail when being applied to the pre-packeged module (which is what is downloaded by Composer) because of the additional information being added to the info file.

Hi
This patch is for Seven theme used with Drupal 9 version.
Thanks

The patch added in #7 makes Seven theme compatible with Ckeditor5. Thanks for the patch @jrglasgow

Thanks all, I think the patch in #8 has a mistake. , I believe it should have a hyphen instead of an underscore, so ckeditor5-stylesheets instead of ckeditor5_stylesheets per the change record → .

#7 works for me with Seven 1.0.0 in D10.2.0. Setting to RTBC.

From a quick test it appears that patch #7 works fine and the warning message on the text format configuration screen is no longer displayed. 👍

Thank you @jrglasgow
Patch #7 worked nicely .

The patch in #7 has been working well for me since 2024-02-13 on D10.