Add status on pages

My problem is this:
I'd like to know if my article is up to date or not.

Currently I use the information / warning / success blocks and I do a global search to find those with the words “Incomplete” or “Needs proofreading”.

But I'd like to have something simpler to set up, like a status to apply and be able to quickly find pages with this status.

Ideally, I'd like to be able to customize the different statuses, but having these 3 statuses would be great:
• Up to date
• Incomplete
• Requires proofreading

Thank you