Review Mode and Track Changes

[Hyedryn]

This PR introduces two features that improve collaboration between authors when writing a paper.

• Review Mode: Enables the built-in Review Mode, available in the Overleaf freemium version, allowing collaborators to add comments directly on sections of the document.
• Track Changes: Activates the Track Changes feature, which monitors edits made by collaborators, similar to Microsoft Word’s revision tracking.

[anthonygego]

It seems I've never been notified of this PR, looks like I was not even watching the repo 👀

This patch looks pretty clean and would be easy to keep on top on the upstream branch. I'll check this asap !

[Hyedryn]

Hi @anthonygego,

Just following up on the PR. Let me know if you need anything to proceed.

Thanks!

[anthonygego]

The diff looks a lot like parts of overleaf@986230d and contains the exact same comments for tricky parts.

It's worth mentioning all the previous contributors, at least for proving we are doing open-source software right.

I'm actually quite concerned by the two FIXME and would like to get more insight on what exact cases these pieces of code can be problematic.