[MIRROR] Gives Cargo its own departmental wires [MDB IGNORE] (#25232)

* Gives Cargo its own departmental wires (#79912)

## About The Pull Request

Gives Cargo its own area wires, instead of having them use the same wire
layouts as the Service areas.
## Why It's Good For The Game

Back when the original PR (#52563) was made, cargo was a weird subset of
"quartermaster" areas that must have just been swept into service. I
looked into it and to my surprise cargo just wasn't ever mentioned in
it. When the QM areas were converted to cargo areas, there weren't any
cargo wires so they probably just inherited the service wires and were
forgotten about?

Now, with the QM being a head and cargo being a more defined department
than ever, it shall receive the distinction of being called "its own
department" in the worst way possible -- by giving it its own wires.
## Changelog
:cl: Rhials
qol: Gives Cargo areas its own wire layout, instead of having it use the
same wires as Service areas.
/:cl:

* Gives Cargo its own departmental wires

---------

Co-authored-by: Rhials <[email protected]>
Co-authored-by: Bloop <[email protected]>

code/datums/wires/airlock.dm

@@ -38,6 +38,10 @@
 	dictionary_key = /datum/wires/airlock/ai
 	proper_name = "AI Airlock"
 
+/datum/wires/airlock/cargo
+	dictionary_key = /datum/wires/airlock/cargo
+	proper_name = "Cargo Airlock"
+
 /datum/wires/airlock/New(atom/holder)
 	wires = list(
 		WIRE_AI,

code/game/area/areas/station/cargo.dm

@@ -1,7 +1,7 @@
 /area/station/cargo
 	name = "Quartermasters"
 	icon_state = "quart"
-	airlock_wires = /datum/wires/airlock/service
+	airlock_wires = /datum/wires/airlock/cargo
 	sound_environment = SOUND_AREA_STANDARD_STATION
 
 /area/station/cargo/sorting