Shovel digging refactor (#19345)

* fixes per pile lootable counts

* shovel digging element

* retooled to flag

* take two

* proc that

* sand digging

* collapse that system in too

* allow base loot

* desc

* potat

* fix that

* no making that on rocks

* oops

* var version

* prevent that dupe

* fixes

---------

Co-authored-by: Cameron Lennox <killer65311@gmail.com>

code/modules/mining/mine_turfs.dm

@@ -373,6 +373,9 @@ GLOBAL_LIST_EMPTY(mining_overlay_cache)
 
 		if(istype(W, /obj/item/shovel))
 			var/obj/item/shovel/S = W
+			if(S.grave_mode)
+				shovel_dig_grave(user, S)
+				return
 			valid_tool = 1
 			digspeed = S.digspeed