[FEATURE_REQUEST] Bookwyrm import include read dates

[kidwellj]

I've noted from previous issues on here that bookwyrm excluded some data on import because it wasn't in the CSV file (noted here #96 (comment)). From what I can tell, this omission is a bookwyrm bug and issue reports (see here: bookwyrm-social/bookwyrm#3215 and here: bookwyrm-social/bookwyrm#2965) suggest it has been resolved (though this requires the fedi instance admin to have updated regularly to the build which includes these fixes). I'm wondering if it might be worthwhile to try and re-open an issue to integrate the dates data, as this is pretty crucial stuff for some libraries.