Drone shell changes (#24379)

* Drone shell changes

Fixes #24376.

- Drone shells are now points of interest.
- Derelict drone shells are now just dusty drone shells.

* For GUN_HOG

* Adds ushanka to derelict drones

* Less compiling errors

_maps/RandomRuins/SpaceRuins/TheDerelict.dmm

@@ -280,7 +280,7 @@
 "ft" = (/obj/structure/grille,/obj/structure/window/reinforced{dir = 4},/turf/open/floor/plating/airless,/area/derelict/singularity_engine)
 "fu" = (/obj/item/stack/cable_coil/cut,/turf/open/floor/plasteel/airless{icon_state = "damaged5"},/area/derelict/singularity_engine)
 "fv" = (/obj/effect/spawner/lootdrop/crate_spawner,/turf/open/floor/plasteel/airless,/area/derelict/bridge/access)
-"fw" = (/obj/effect/mob_spawn/derelict_drone,/turf/open/floor/plasteel/airless,/area/derelict/bridge/access)
+"fw" = (/obj/item/drone_shell/dusty,/turf/open/floor/plasteel/airless,/area/derelict/bridge/access)
 "fx" = (/turf/open/floor/plasteel/airless,/area/derelict/bridge/access)
 "fy" = (/obj/structure/table,/obj/item/device/assembly/flash/handheld,/turf/open/floor/plasteel/airless,/area/derelict/bridge/access)
 "fz" = (/obj/structure/table,/obj/machinery/light/small{dir = 1},/obj/item/weapon/electronics/airlock,/turf/open/floor/plasteel/airless,/area/derelict/bridge/access)
@@ -427,7 +427,7 @@
 "ik" = (/obj/structure/chair,/turf/open/floor/plasteel/airless{icon_state = "damaged3"},/area/derelict/medical)
 "il" = (/obj/structure/table,/obj/effect/spawner/lootdrop/maintenance,/turf/open/floor/plating/airless,/area/derelict/medical)
 "im" = (/obj/item/weapon/storage/box/lights/mixed,/turf/open/floor/plating/airless,/area/derelict/singularity_engine)
-"in" = (/obj/effect/mob_spawn/derelict_drone,/turf/open/floor/plating/airless,/area/derelict/singularity_engine)
+"in" = (/obj/item/drone_shell/dusty,/turf/open/floor/plating/airless,/area/derelict/singularity_engine)
 "io" = (/obj/effect/spawner/lootdrop/maintenance,/turf/open/floor/plating/airless,/area/derelict/singularity_engine)
 "ip" = (/obj/item/stack/cable_coil/cut{amount = 2;dir = 2;icon_state = "coil_red2"},/turf/open/floor/plasteel/airless{icon_state = "damaged2"},/area/derelict/hallway/primary)
 "iq" = (/turf/open/floor/plasteel/airless{icon_state = "damaged4"},/area/ruin/unpowered/no_grav)
@@ -720,7 +720,7 @@
 "nR" = (/turf/open/floor/plasteel/airless,/area/derelict/se_solar)
 "nS" = (/obj/structure/reagent_dispensers/fueltank,/turf/open/floor/plasteel/airless,/area/derelict/se_solar)
 "nT" = (/obj/docking_port/stationary{dheight = 0;dir = 2;dwidth = 11;height = 22;id = "whiteship_z4";name = "KSS13: Derelict";width = 35},/turf/open/space,/area/space)
-"nU" = (/obj/machinery/power/terminal{icon_state = "term";dir = 1},/obj/structure/cable{icon_state = "0-2";d2 = 2},/obj/effect/mob_spawn/derelict_drone,/turf/open/floor/plasteel/airless,/area/derelict/se_solar)
+"nU" = (/obj/machinery/power/terminal{icon_state = "term";dir = 1},/obj/structure/cable{icon_state = "0-2";d2 = 2},/obj/item/drone_shell/dusty,/turf/open/floor/plasteel/airless,/area/derelict/se_solar)
 "nV" = (/turf/open/floor/plating/airless,/area/derelict/se_solar)
 "nW" = (/obj/machinery/atmospherics/components/unary/vent_pump{on = 1},/turf/open/floor/plasteel/airless,/area/derelict/se_solar)
 "nX" = (/obj/item/weapon/storage/toolbox/syndicate,/turf/open/floor/plasteel/airless,/area/derelict/se_solar)

code/game/objects/structures/ghost_role_spawners.dm

@@ -287,14 +287,3 @@
 /obj/effect/mob_spawn/human/hotel_staff/Destroy()
 	new/obj/structure/fluff/empty_sleeper/syndicate(get_turf(src))
 	..()
-
-/obj/effect/mob_spawn/derelict_drone
-	name = "dust-caked drone shell"
-	desc = "A long-forgotten drone shell."
-	flavour_text = "This station sure is a mess. It's time to get to work."
-	mob_name = "a derelict drone"
-	mob_type = /mob/living/simple_animal/drone
-	icon = 'icons/mob/drone.dmi'
-	icon_state = "drone_maint_hat"
-	death = FALSE
-	roundstart = FALSE

code/modules/mob/living/simple_animal/friendly/drone/drones_as_items.dm

@@ -21,6 +21,11 @@
 	var/area/A = get_area(src)
 	if(A)
 		notify_ghosts("A drone shell has been created in \the [A.name].", source = src, action=NOTIFY_ATTACK, flashwindow = FALSE)
+	poi_list |= src
+
+/obj/item/drone_shell/Destroy()
+	poi_list -= src
+	. = ..()
 
 /obj/item/drone_shell/attack_ghost(mob/user)
 	if(jobban_isbanned(user,"drone"))

code/modules/mob/living/simple_animal/friendly/drone/extra_drone_types.dm

@@ -182,3 +182,12 @@
 
 /mob/living/simple_animal/drone/cogscarab/ratvar_act()
 	fully_heal(TRUE)
+
+/obj/item/drone_shell/dusty
+	name = "derelict drone shell"
+	desc = "A long-forgotten drone shell. It seems kind of... Space Russian."
+	drone_type = /mob/living/simple_animal/drone/derelict
+
+/mob/living/simple_animal/drone/derelict
+	name = "derelict drone"
+	default_hatmask = /obj/item/clothing/head/ushanka