Allows the Trader Shuttle to be Manipulated by the Shuttle Manipulator + Very minor other trade shuttle content (#30849)

* A surprising number of file changes, this needed.

* lateload wooo

* Update centcomm.dmm

* Update centcomm.dmm

* Update shuttles.dm

---------

Co-authored-by: Fordoxia <143041327+Fordoxia@users.noreply.github.com>

code/modules/shuttle/shuttle.dm

@@ -920,12 +920,24 @@
 	width = 5
 	preferred_direction = EAST
 
+/obj/docking_port/stationary/trader
+	id = "trader_home"
+	name = "Docking bay 4 at station"
+	width = 22
+	dwidth = 11
+	height = 30
+
+/obj/docking_port/stationary/trader/centcom
+	id = "trader_away"
+	name = "Docking bay at trade hub"
+	dir = 8
+
 /obj/docking_port/mobile/trader
 	dir = 8
 	dwidth = 11
 	height = 30
 	id = "trader"
-	name = "sol trade shuttle"
+	name = "trade shuttle"
 	width = 22
 	preferred_direction = EAST
 	timid = TRUE
@@ -1141,7 +1153,7 @@
 
 /obj/machinery/computer/shuttle/trade/sol
 	req_access = list(ACCESS_TRADE_SOL)
-	possible_destinations = "trader_base;trade_dock"
+	possible_destinations = "trader_away;trader_home"
 	shuttleId = "trader"
 
 //#undef DOCKING_PORT_HIGHLIGHT