Turrets Now Actually Connect To Their Console Consistently (#3412)

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## About The Pull Request
makes turrets link to their console once everything has been linked to
the shuttle.

Adds a proc just in case anyone else needs 2 do this.
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## Why It's Good For The Game
functional code
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## Changelog

:cl:
fix: turrets will now _actually_ connect to their console. i swear im a
real coder.
/:cl:

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code/__DEFINES/dcs/signals/signals_ship.dm

@@ -0,0 +1,2 @@
+///Sent when a shuttle finishes loading to allow for any machinery that requires a late connection to fire that connection
+#define COMSIG_SHIP_DONE_CONNECTING "late_connect"

code/game/machinery/porta_turret/portable_turret.dm

@@ -949,6 +949,14 @@ DEFINE_BITFIELD(turret_flags, list(
 
 /obj/machinery/turretid/connect_to_shuttle(obj/docking_port/mobile/port, obj/docking_port/stationary/dock)
 	id = "[REF(port)][id]"
+	RegisterSignal(port, COMSIG_SHIP_DONE_CONNECTING, PROC_REF(late_connect_to_shuttle))
+
+/obj/machinery/turretid/disconnect_from_shuttle(obj/docking_port/mobile/port)
+	UnregisterSignal(port, COMSIG_SHIP_DONE_CONNECTING)
+
+/obj/machinery/turretid/proc/late_connect_to_shuttle(obj/docking_port/mobile/port, obj/docking_port/stationary/dock)
+	SIGNAL_HANDLER
+
 	for(var/datum/weakref/ship_guns in port.turret_list)
 		var/obj/machinery/porta_turret/turret_gun = ship_guns.resolve()
 		if(turret_gun.id == id)

code/modules/shuttle/shuttle.dm

@@ -431,6 +431,7 @@
 		for(var/each in place)
 			var/atom/atom = each
 			atom.connect_to_shuttle(src, dock)
+	SEND_SIGNAL(src, COMSIG_SHIP_DONE_CONNECTING, dock)
 
 //this is a hook for custom behaviour. Maybe at some point we could add checks to see if engines are intact
 /obj/docking_port/mobile/proc/can_move()

shiptest.dme

@@ -163,6 +163,7 @@
 #include "code\__DEFINES\dcs\helpers.dm"
 #include "code\__DEFINES\dcs\signals\signals.dm"
 #include "code\__DEFINES\dcs\signals\signals_mod.dm"
+#include "code\__DEFINES\dcs\signals\signals_ship.dm"
 #include "code\__DEFINES\dcs\signals\signals_storage.dm"
 #include "code\__DEFINES\dcs\signals\signals_mob\signals_mob_carbon.dm"
 #include "code\__DEFINES\dcs\signals\signals_obj\signals_object.dm"