[Ready] Bone Anvil and processable Bone ingots (#15290)

* Adding all the extra stuff

* whoops, slipped my last fix in here.

* bone balance

* 6 Goliaths + 3 Watchers + 1 Legion

* bumps the damage modifier down to 1.05

* More Bones.

* Undoes the undoing of the other fix PR

Co-authored-by: Emily <null>

code/modules/smithing/smithed_items.dm

@@ -49,6 +49,9 @@
 /obj/item/ingot/iron
 	custom_materials = list(/datum/material/iron=12000)
 
+/obj/item/ingot/bone
+	custom_materials = list(/datum/material/bone=4000)
+
 /obj/item/ingot/diamond
 	custom_materials = list(/datum/material/diamond=12000)