Update SSOverlays (ported from Baystation) (#19051)

Our SSOverlays system is outdated, and is likely the cause of many of
the issues seen in #18895. It has also been linked to a massive server
performance decrease.

This brings an updated system from Baystation, hopefully with speed
increases.

Should be testmerged, ideally with #18895.

---------

Co-authored-by: Cody Brittain <cbrittain10@live.com>

code/modules/overmap/exoplanets/decor/_turfs.dm

@@ -75,11 +75,11 @@
 		. = ..()
 
 	else if(has_edge_icon)
-		cut_overlays()
+		ClearOverlays()
 		if(resource_indicator)
-			add_overlay(resource_indicator)
+			AddOverlays(resource_indicator)
 		if(LAZYLEN(decals))
-			add_overlay(decals)
+			AddOverlays(decals)
 		for(var/direction in GLOB.cardinal)
 			var/turf/turf_to_check = get_step(src,direction)
 			if(!istype(turf_to_check, type))

code/modules/overmap/exoplanets/decor/flora/konyang.dm

@@ -15,7 +15,7 @@
 
 /obj/structure/flora/tree/konyang/spring/Initialize(mapload)
 	. = ..()
-	cut_overlays()
+	ClearOverlays()
 	overlays += /obj/effect/overlay/konyang_tree
 	icon_state = "beet_tree[rand(1, 3)]"
 	return
@@ -26,7 +26,7 @@
 
 /obj/structure/flora/tree/konyang/blossom/Initialize(mapload)
 	. = ..()
-	cut_overlays()
+	ClearOverlays()
 	overlays += /obj/effect/overlay/konyang_tree
 	icon_state = "blossom_beet_tree[rand(1, 3)]"
 	return
@@ -37,7 +37,7 @@
 
 /obj/structure/flora/tree/konyang/fall/Initialize(mapload)
 	. = ..()
-	cut_overlays()
+	ClearOverlays()
 	overlays += /obj/effect/overlay/konyang_tree
 	icon_state = "fall_beet_tree[rand(1, 3)]"
 	return

code/modules/overmap/exoplanets/decor/objs/monolith.dm

@@ -23,10 +23,10 @@
 		I.appearance_flags = RESET_COLOR
 		I.color = get_random_colour(0, 150, 255)
 		I.plane = EFFECTS_ABOVE_LIGHTING_PLANE
-		add_overlay(I)
+		AddOverlays(I)
 		set_light(0.3, 0.1, 2, l_color = I.color)
 
 	var/turf/simulated/floor/exoplanet/T = get_turf(src)
 	if(istype(T))
 		var/image/I = overlay_image(icon, "dugin", T.dirt_color, RESET_COLOR)
-		add_overlay(I)
+		AddOverlays(I)

code/modules/overmap/exoplanets/themes/_theme.dm

@@ -263,7 +263,7 @@
 				resource_indicator.alpha = rand(30, 60)
 				gen_turf.resource_indicator = resource_indicator
 				if(!gen_turf.density)
-					gen_turf.add_overlay(resource_indicator)
+					gen_turf.AddOverlays(resource_indicator)
 				for(var/OT in ground_ore_levels[ground_resources_roll])
 					var/rand_vals = ground_ore_levels[ground_resources_roll][OT]
 					gen_turf.resources[OT] = rand(rand_vals[1], rand_vals[2])

code/modules/overmap/overmap_object.dm

@@ -177,7 +177,7 @@
 		C.targeting = FALSE
 		targeting = O
 		O.targeted_overlay = icon('icons/obj/overmap/overmap_effects.dmi', "lock")
-		O.add_overlay(O.targeted_overlay)
+		O.AddOverlays(O.targeted_overlay)
 		if(designation && class && !obfuscated)
 			if(!O.maptext)
 				O.maptext = SMALL_FONTS(6, "[class] [designation]")
@@ -207,6 +207,6 @@
 	if(C)
 		playsound(C, 'sound/items/rfd_interrupt.ogg', 70)
 	if(O)
-		O.cut_overlay(O.targeted_overlay)
+		O.CutOverlays(O.targeted_overlay)
 		O.maptext = null
 	targeting = null

code/modules/overmap/sectors.dm

@@ -194,10 +194,10 @@ var/global/area/overmap/map_overmap // Global object used to locate the overmap
 	if(has_called_distress_beacon)
 		var/image/distress_overlay = image('icons/obj/overmap/overmap_effects.dmi', "distress")
 		applied_distress_overlay = distress_overlay
-		add_overlay(applied_distress_overlay)
+		AddOverlays(applied_distress_overlay)
 		filters = filter(type = "outline", size = 2, color = COLOR_RED)
 	else
-		cut_overlay(applied_distress_overlay)
+		CutOverlays(applied_distress_overlay)
 		filters = null
 
 /obj/effect/overmap/visitable/proc/update_name()

code/modules/overmap/ship_weaponry/weaponry/longbow_ammo.dm

@@ -40,14 +40,14 @@
 		primer = P
 		P.forceMove(src)
 		var/image/OL = image(P.icon, P.primer_state, layer = layer - 0.01)
-		add_overlay(OL)
+		AddOverlays(OL)
 	update_status()
 
 /obj/item/ship_ammunition/longbow/proc/add_warhead(var/obj/item/warhead/W)
 	if(W && !QDELETED(W))
 		warhead = W
 		W.forceMove(src)
-		add_overlay(W.warhead_state)
+		AddOverlays(W.warhead_state)
 		impact_type = W.warhead_type
 		ammunition_flags = initial(ammunition_flags)
 		ammunition_flags |= SHIP_AMMO_FLAG_VERY_FRAGILE

code/modules/overmap/ships/computers/sensors.dm

@@ -454,7 +454,7 @@
 /obj/machinery/shipsensors/update_icon()
 	icon_state = "[base_icon_state]_off"
 	if(!use_power)
-		cut_overlays()
+		ClearOverlays()
 
 	if(use_power)
 		icon_state = "[base_icon_state]_on"
@@ -475,11 +475,11 @@
 	else
 		overlay = "[overlay]5"
 
-	cut_overlays()
-	add_overlay(overlay)
+	ClearOverlays()
+	AddOverlays(overlay)
 	var/heat_percentage = heat / critical_heat * 100
 	if(heat_percentage > 85)
-		add_overlay("sensors-effect-hot")
+		AddOverlays("sensors-effect-hot")
 
 /obj/machinery/shipsensors/get_examine_text(mob/user, distance, is_adjacent, infix, suffix)
 	. = ..()

code/modules/overmap/ships/identification.dm

@@ -70,7 +70,7 @@
 
 /obj/machinery/iff_beacon/update_icon()
 	icon_state = initial(icon_state)
-	cut_overlays()
+	ClearOverlays()
 	if(panel_open)
 		icon_state += "_o"
 	if(!operable() || !use_power)