Add cardboard recycling. (#31937)

* Add cardboard recycling.

* Add more cardboard items to the recycling list.

code/modules/clothing/suits/cardborg_suit.dm

@@ -27,6 +27,7 @@ CONTENTS:
 	)
 	/// All the borg skins that this can disguise you as.
 	var/list/available_disguises = list("Standard")
+	materials = list(MAT_CARDBOARD = 2000)
 
 /obj/item/clothing/head/cardborg/examine_more(mob/user)
 	. = ..()
@@ -114,6 +115,7 @@ CONTENTS:
 	body_parts_covered = UPPER_TORSO|LOWER_TORSO
 	flags_inv = HIDEJUMPSUIT
 	species_disguise = "High-tech robot"
+	materials = list(MAT_CARDBOARD = 6000)
 
 /obj/item/clothing/suit/cardborg/examine_more(mob/user)
 	. = ..()

code/modules/food_and_drinks/drinks/drinks/carton.dm

@@ -5,6 +5,7 @@
 	volume = 30
 	icon = 'icons/obj/juice_box.dmi'
 	icon_state = null
+	materials = list(MAT_CARDBOARD = 500)
 
 /obj/item/reagent_containers/drinks/carton/Initialize(mapload)
 	if(!length(list_reagents))

code/modules/food_and_drinks/food/foods/pizza.dm

@@ -287,6 +287,7 @@
 	var/box_tag = ""
 	/// The type of pizza that's spawned in the box.
 	var/pizza_type
+	materials = list(MAT_CARDBOARD = 2000)
 
 /obj/item/pizzabox/Initialize(mapload)
 	. = ..()

code/modules/paperwork/folders.dm

@@ -6,6 +6,7 @@
 	w_class = WEIGHT_CLASS_SMALL
 	pressure_resistance = 2
 	resistance_flags = FLAMMABLE
+	materials = list(MAT_CARDBOARD = 2000)
 
 /obj/item/folder/emp_act(severity)
 	..()