Implementing undo in bevy

[ThomasAlban]

I would like to implement undo in my bevy application. I have a number of points whose positions can be modified, the points can be created/deleted, or properties on the points' components can also be modified. I have seen the bevy-undo2 crate which I could use, but it seems annoying to have to create an event every time the state of the application is modified. Is there some kind of diffing algorithm that can be applied to all editable points to work out what has changed, and push only that change to the undo stack? That way I would only have to call set_undo_point() when the state of the app is modified, and the correct command will be pushed.