Expose editor instance in the editable DOM elements

[Reinmar]

Some integrations or external addons need to be able to access the editor instance which controls a specific DOM editable element. E.g. the CKEditor 5 inspector could benefit from that – you'd be able to run it by clicking the editable element you want to inspect.

[Reinmar]

It'd be also cool to have it somewhere in this property docs how to do the following:

const ckeditorInstance = domEditableElement.ckeditorInstance;

ckeditorInstance.editing.view.change( writer => {
        const viewEditableElement = ckeditorInstance.editing.view.domConverter.mapDomToView( domEditableElement );

        writer.setAttribute( 'spellcheck', 'false', viewEditableElement );
} );