Adds an engineer role for the freelancer mercenaries, purges a lot of their access (#7869)

Adds the freelancer engineer role, lessens freelancer access.

code/datums/outfits/ert/ert.dm

@@ -162,7 +162,7 @@
 	)
 
 /datum/outfit/admin/ert/mercenary/get_id_access()
-	return get_distress_access()
+	return get_distress_access_lesser()
 
 /datum/outfit/admin/ert/mercenary/specialist
 	name = "Mercenary Freelancer Medic"
@@ -185,6 +185,33 @@
 		/obj/item/reagent_containers/glass/bottle/thetamycin = 1
 	)
 
+/datum/outfit/admin/ert/mercenary/engineer
+	name = "Mercenary Freelancer Combat Engineer"
+
+	back = /obj/item/storage/backpack/duffel
+	belt = /obj/item/storage/belt/utility/full
+	gloves = /obj/item/clothing/gloves/yellow
+	accessory = /obj/item/clothing/accessory/storage/brown_vest
+	accessory_contents = list(
+								/obj/item/plastique = 5
+							)
+
+	backpack_contents = list(
+		/obj/item/material/knife/trench = 1,
+		/obj/item/shield/energy = 1,
+		/obj/item/handcuffs/ziptie = 1,
+		/obj/item/tank/oxygen = 1,
+		/obj/item/device/multitool = 1,
+		/obj/item/weldingtool/hugetank = 1,
+		/obj/item/clothing/glasses/welding/superior = 1,
+		/obj/item/gun/projectile/shotgun/pump/combat/sol = 1,
+		/obj/item/storage/box/shotgunshells = 1,
+		/obj/item/landmine/frag = 1,
+		/obj/item/landmine/emp = 1
+	)
+
+	belt_contents = null
+
 /datum/outfit/admin/ert/mercenary/leader
 	name = "Mercenary Freelancer Leader"
 	l_hand = /obj/item/gun/projectile/automatic/rifle/sts35