Adds the Odyssey gamemode. (#18972)

https://forums.aurorastation.org/topic/20198-mission-briefing-auroras-gamemode-revolution

To-do:

- [x] Finish storyteller verbs.
- [x] Storyteller landmarks.
- [x] Proper storyteller spawning. Right now the gamemode system is
happy with just picking one storyteller and no actors.
- [x] Antagonist whitelists code.
- [x] Adding the Storyteller whitelist.
- [x] Mission map loading code.
- [x] Map in a bunch of missions.
- [ ] Storyteller adminhelps.

---------

Co-authored-by: Matt Atlas <liermattia@gmail.com>
Co-authored-by: DreamySkrell <>

code/modules/multiz/movement.dm

@@ -112,7 +112,7 @@
 	else
 		to_chat(owner, SPAN_NOTICE("There is nothing of interest in this direction."))
 
-/mob/abstract/observer/zMove(direction)
+/mob/abstract/ghost/observer/zMove(direction)
 	var/turf/T = get_turf(src)
 	var/turf/destination = (direction == UP) ? GET_TURF_ABOVE(T) : GET_TURF_BELOW(T)
 	if(destination)
@@ -133,7 +133,7 @@
 		return TRUE
 	return FALSE
 
-/mob/abstract/observer/can_ztravel(var/direction)
+/mob/abstract/ghost/observer/can_ztravel(var/direction)
 	return TRUE
 
 /mob/living/carbon/human/can_ztravel(var/direction)

code/modules/multiz/structures.dm

@@ -148,7 +148,7 @@
 		return FALSE
 	return TRUE
 
-/mob/abstract/observer/may_climb_ladders(var/ladder)
+/mob/abstract/ghost/observer/may_climb_ladders(var/ladder)
 	return TRUE
 
 /obj/structure/ladder/proc/climbLadder(var/mob/M, var/target_ladder)