Mitigates (autolathe) recycling exploits by minimizing what can be recycled, adding unit tests and fixing the recipes (#10375)

* Mitigates research recycling exploits by minimizing what can be recycled

* Moves the research design check into a new unit test

* Adds unit test for stack material recipes costs and fixes these costs

* Instead of changing recipes the resulting materials are worth less

* Crap fix

code/modules/assembly/assembly.dm

@@ -6,6 +6,7 @@
 	flags = CONDUCT
 	w_class = ITEMSIZE_SMALL
 	matter = list(DEFAULT_WALL_MATERIAL = 100)
+	recyclable = TRUE
 	throwforce = 2
 	throw_speed = 3
 	throw_range = 10
@@ -108,4 +109,4 @@
 
 
 /obj/item/device/assembly/interact(mob/user)
-	return
+	return