Odoo replaces its previous Summernote editor with the new Jabberwock editor across website editing, web editor features, and mass mailing content creation. This is a significant user-facing modernization intended to improve the editing experience and align related tools on a shared editor foundation.

This PR replaces Summernote by Odoo's new editor: [Jabberwock](https://github.com/odoo-dev/jabberwock).