Add enhanced CKEditor 5 plugin

[roslovets]

Add new CKEditor 5 plugin that works with the latest version of Strapi without bugs and based on enhaced build of CKEditor.

By submitting this pull request, I promise that:

• [x] I have read the contribution guidelines thoroughly.
• [x] I ensure my submission follows each and every point.

[roslovets]

Should I change something?