Add "autosave" as new operation

[ClementLaval]

Hi, I'm using the afterChange hook within my Page, Post ... collections to revalidate my NextJs (ISR) page every time a new update is coming.
However, the operation can only handle "create" and "update", also every time the autosave is triggered my front-end cache is wiped.
This is not very practical, as it leads to a lot of unwanted revalidations.
It would be interesting to be able to distinguish between an "autosave" and a "publish".