Give sniffers the ability to sniff out buried structures

It would be interesting to give sniffers the ability to sniff out buried structures (e.g., trail ruins, ancient cities, fossils... etc), similar to how dolphins in the game can guide players to the location of nearby shipwrecks and ocean ruins when fed with raw fishes. Different items can be given to the sniffer to locate different structures (for example, sculk block for ancient city and bone block for fossil). This change would not only make sniffers more useful but also give players a better in-game mechanic to locate these otherwise hard-to-find structures.