Add mentions in comments in Nextcloud OnlyOffice app
Add the possibility to mention users in Nextcloud OnlyOffice app.
I investigated a bit, it doesn't seem that hard.
Doc OnlyOffice: https://api.onlyoffice.com/editors/mentions
Need to implement onRequestUsers func and setUsers in Nextcloud app. https://github.com/ONLYOFFICE/onlyoffice-nextcloud/blob/master/js/listener.js
It should be similar to how comments work on nextcloud. https://github.com/nextcloud/server/blob/905e1918d2796b9a79025283cd6edf2c40f49d77/apps/comments/src/commentstabview.js#L190