[WIP] Add option to delete comments in collaborative documents

[Copilot]

Thanks for asking me to work on this. I will get started on it and keep this PR's description up to date as I form a plan and make progress.

---

This section details on the original issue you should resolve

<issue_title>[Enhancement] Possibility to delete comments</issue_title>
<issue_description>Hi! We often write larger texts with many revisions and iterations. By the time, especially when many people are involved, it get's chaotic with all the comments on the side, because we can't delete comments, even if they're fixed. Maybe the person can do, but also not after quitting the season so in any case they stay there forever... So especially the "main author" can't keep track on the comments and hasn't the possiblity to "moderate" the pad/the text. Would be cool to implement the option. Thanks in advance! </issue_description>

Comments on the Issue (you are @copilot in this section)