Adds Cryo QoL with hotkeys

Ctrl click to swap power, Alt click to close/open machine. This is how you do a "QoL" PR.

code/modules/atmospherics/machinery/components/unary_devices/cryo.dm

@@ -394,6 +394,21 @@
 				. = TRUE
 	update_icon()
 
+/obj/machinery/atmospherics/components/unary/cryo_cell/CtrlClick(mob/user)
+	if(user.canUseTopic(src, BE_CLOSE, FALSE, NO_TK) && !state_open)
+		on = !on
+		update_icon()
+	return ..()
+
+/obj/machinery/atmospherics/components/unary/cryo_cell/AltClick(mob/user)
+	if(user.canUseTopic(src, BE_CLOSE, FALSE, NO_TK))
+		if(state_open)
+			close_machine()
+		else
+			open_machine()
+		update_icon()
+	return ..()
+
 /obj/machinery/atmospherics/components/unary/cryo_cell/update_remote_sight(mob/living/user)
 	return // we don't see the pipe network while inside cryo.