CKEditor 5 Support

I created a MR from the patch + a few Drupal 10 related changes:

• The more and less texts are now translatable config
• Removed jQuery once dependency
• Removed CKEditor dependency
• Drupal 10 compatibility

It seems to be working fine for me, but I did not thoroughly code review the initial patch.

I hope it's ok but I merged in the changes from 📌 Automated Drupal 10 compatibility fixes Needs review . I did this primarily because there was no composer.json file in this repo and it was already created there. I couldn't actually use the work here in composer until that was done.

Hopefully this will create less merge conflicts after that ticket is merged and then this one comes after.

Alternatively we might want to consider a 3.x branch and leave the 2.x branch to be compatible with Drupal 10 + ckeditor4.

Added .toLowerCase() because for some reason element.innerText uses the CSS styled version.

In our case our CSS styling was applying text-transform: uppercase and this was breaking the toggle.

Setting this to RTBC because I think it would be good to have a release out there.

Worked great for me.

I tried MR changes as patch (https://git.drupalcode.org/project/ckeditor_readmore/-/merge_requests/4....) but its not getting applied on ckeditor_readmore (2.0.0)

I think those numbers are misleading due to the default branch on the upstream still being set to 7.x-1.0.

https://git.drupalcode.org/issue/ckeditor_readmore-3388400/-/network/fea...

Thank you all involved into making this possible!! :)
I merged it to the 3.x version and deployed it to the 3.0.0-alpha1. In that version, I also removed CKEditor4 files.