Explorer Overhaul and Gateway Retirement (#20855)

* Adds Explorer spawnability, removes Cyberaid gateways

* deletes some REALLY old bloat maps and deletes Gateway.dm

* Fixes runtime, and removes more stuff like gateway config... cause we dont have a gateway anymore

* removes all mention of /obj/machine/gateway

* Goodbye test_tiny and evil_santa 😈

* removed a literal fucking pamphlet

* changes map area name from Gateway to Expedetition

* changes the access from ACCESS_GATEWAY to ACCESS_EXPEDITION

* Revert "Goodbye test_tiny and evil_santa 😈"

This reverts commit eda775ecd5.

* ok deletes evil_santa only

* Fixes a runtime

* Adds new visuals for new area and explorer spawn marker

* Unhides explorers from the pref menu

* adds spawns and fixes the gateways for all maps, adds Expedition room to Cere

* improves and cleans up the expedition room maps, also clothes for Explorers

* GET OUT OF HERE EXAMPLE.

* byebye button

code/modules/client/preference/character.dm

@@ -1149,7 +1149,18 @@
 						clothes_s.Blend(new /icon('icons/mob/clothing/back.dmi', "satchel-norm"), ICON_OVERLAY)
 					if(4)
 						clothes_s.Blend(new /icon('icons/mob/clothing/back.dmi', "satchel"), ICON_OVERLAY)
-
+			if(JOB_EXPLORER)
+				clothes_s = new /icon('icons/mob/clothing/under/color.dmi', "orange_s")
+				clothes_s.Blend(new /icon('icons/mob/clothing/feet.dmi', "workboots"), ICON_UNDERLAY)
+				clothes_s.Blend(new /icon('icons/mob/clothing/hands.dmi', "bgloves"), ICON_OVERLAY)
+				has_gloves = TRUE
+				switch(backbag)
+					if(2)
+						clothes_s.Blend(new /icon('icons/mob/clothing/back.dmi', "backpack"), ICON_OVERLAY)
+					if(3)
+						clothes_s.Blend(new /icon('icons/mob/clothing/back.dmi', "satchel-norm"), ICON_OVERLAY)
+					if(4)
+						clothes_s.Blend(new /icon('icons/mob/clothing/back.dmi', "satchel"), ICON_OVERLAY)
 	else if(job_medsci_high)
 		switch(job_medsci_high)
 			if(JOB_RD)