Archeologist Villager that trades lead maps

We stall aren't completely sure how finding dig sites will work in game, how rare they will be, or how easy to spot them either. So i think we should add a new village that can trade you not only items relating to archeology but also dig site leads which are maps that show where you can find sites to excavate.

At the very least these maps should be sold by the cartographer

This function would very much help make this feature usable and enjoyable