Allows faxing of paintings (#82384)

## About The Pull Request

Adds painting canvases to the allowed list of fax machine input/outputs.

## Why It's Good For The Game

A picture is worth 1000 words; now you can depict the captain as the
soyjack and yourself as the chad.
They're flat means of visual communication... I will admit it's maybe a
stretch that you could fit the larger canvases in but let's imagine that
the machine folds and unfolds them.

## Changelog

🆑
add: You can now fax painted canvases in order to send memes to each
other.
/🆑

code/modules/paperwork/fax.dm

@@ -33,22 +33,23 @@ GLOBAL_VAR_INIT(nt_fax_department, pick("NT HR Department", "NT Legal Department
 	var/list/fax_history = list()
 	/// List of types which should always be allowed to be faxed
 	var/static/list/allowed_types = list(
+		/obj/item/canvas,
 		/obj/item/paper,
 		/obj/item/photo,
-		/obj/item/tcgcard
+		/obj/item/tcgcard,
 	)
 	/// List of types which should be allowed to be faxed if hacked
 	var/static/list/exotic_types = list(
-		/obj/item/food/pizzaslice,
-		/obj/item/food/root_flatbread,
-		/obj/item/food/pizza/flatbread,
-		/obj/item/food/breadslice,
-		/obj/item/food/salami,
-		/obj/item/throwing_star,
-		/obj/item/stack/spacecash,
-		/obj/item/holochip,
 		/obj/item/card,
 		/obj/item/folder/biscuit,
+		/obj/item/food/breadslice,
+		/obj/item/food/pizza/flatbread,
+		/obj/item/food/pizzaslice,
+		/obj/item/food/root_flatbread,
+		/obj/item/food/salami,
+		/obj/item/holochip,
+		/obj/item/stack/spacecash,
+		/obj/item/throwing_star,
 	)
 	/// List with a fake-networks(not a fax actually), for request manager.
 	var/list/special_networks = list(