Adds desc to things lacking them. (#31086)

* Desc change

* Update girders.dm

* Update valve.dm

* Update machine_stacking.dm

* Update shuttle_engines.dm

* Update pipe_dispenser.dm

* Update lib_items.dm

code/game/machinery/embedded_controller/access_controller.dm

@@ -42,6 +42,7 @@
 	icon = 'icons/obj/airlock_machines.dmi'
 	icon_state = "access_button_standby"
 	name = "access button"
+	desc = "A button used for the explicit purpose of opening an airlock."
 	var/idDoor
 	var/obj/machinery/door/airlock/door
 	var/obj/machinery/doorButtons/airlock_controller/controller
@@ -107,6 +108,7 @@
 	icon = 'icons/obj/airlock_machines.dmi'
 	icon_state = "access_control_standby"
 	name = "access console"
+	desc = "A small console that can cycle opening between two airlocks."
 	var/obj/machinery/door/airlock/interiorAirlock
 	var/obj/machinery/door/airlock/exteriorAirlock
 	var/idInterior