Repath obj/machinery to obj/structure/machinery [MDB Ignore] (#22500)

Repaths obj/machinery to obj/structure/machinery. **Note for
reviewers:** the only meaningful changed code exists within
**code/game/objects/structures.dm** and
**code/game/objects/structures/_machinery.dm**, largely concerning
damage procs. With the exception of moving airlock defines to their own
file, ALL OTHER CHANGES ARE STRICTLY PATH CHANGES.

Objects, _categorically_, are largely divided between those you can hold
in your hand/inventory and those you can't. Machinery objects are
already subtypes of Structures behaviorally, this PR just makes their
pathing reflect that, and allows for future work (tool actions, more
health/destruction functionality) to be developed without unnecessary
code duplication.

I have tested this PR by loading up the Horizon and dismantling various
machines and structures with tools, shooting guns of various types
throughout the ship, and detonating a bunch of explosions throughout the
ship.

code/modules/modular_computers/NTNet/NTNet.dm

@@ -32,7 +32,7 @@ GLOBAL_DATUM_INIT(ntnet_global, /datum/ntnet, new)
 /datum/ntnet/New()
 	if(GLOB.ntnet_global && (GLOB.ntnet_global != src))
 		GLOB.ntnet_global = src // There can be only one.
-	for(var/obj/machinery/ntnet_relay/R in SSmachinery.machinery)
+	for(var/obj/structure/machinery/ntnet_relay/R in SSmachinery.machinery)
 		relays.Add(R)
 		R.NTNet = src
 	build_software_lists()
@@ -70,7 +70,7 @@ GLOBAL_DATUM_INIT(ntnet_global, /datum/ntnet, new)
 	var/operating = FALSE
 
 	// Check all relays. If we have at least one working relay, network is up.
-	for(var/obj/machinery/ntnet_relay/R in relays)
+	for(var/obj/structure/machinery/ntnet_relay/R in relays)
 		if(R.operable())
 			operating = TRUE
 			break

code/modules/modular_computers/NTNet/NTNet_relay.dm

@@ -1,5 +1,5 @@
 // Relays don't handle any actual communication. Global NTNet datum does that, relays only tell the datum if it should or shouldn't work.
-/obj/machinery/ntnet_relay
+/obj/structure/machinery/ntnet_relay
 	name = "NTNet Quantum Relay"
 	desc = "A very complex router and transmitter capable of connecting electronic devices together. Looks fragile."
 	use_power = POWER_USE_ACTIVE
@@ -25,7 +25,7 @@
 	)
 
 // TODO: Implement more logic here. For now it's only a placeholder.
-/obj/machinery/ntnet_relay/operable()
+/obj/structure/machinery/ntnet_relay/operable()
 	if(!..(EMPED))
 		return FALSE
 	if(dos_failure)
@@ -34,7 +34,7 @@
 		return FALSE
 	return TRUE
 
-/obj/machinery/ntnet_relay/update_icon()
+/obj/structure/machinery/ntnet_relay/update_icon()
 	ClearOverlays()
 	if(operable())
 		AddOverlays(emissive_appearance(icon, "[icon_state]_lights"))
@@ -48,7 +48,7 @@
 	if(panel_open)
 		AddOverlays("[icon_state]_panel")
 
-/obj/machinery/ntnet_relay/process()
+/obj/structure/machinery/ntnet_relay/process()
 	if(operable())
 		update_use_power(POWER_USE_ACTIVE)
 	else
@@ -69,13 +69,13 @@
 		GLOB.ntnet_global.add_log("Quantum relay switched from overload recovery mode to normal operation mode.")
 	..()
 
-/obj/machinery/ntnet_relay/ui_interact(mob/user, datum/tgui/ui)
+/obj/structure/machinery/ntnet_relay/ui_interact(mob/user, datum/tgui/ui)
 	ui = SStgui.try_update_ui(user, src, ui)
 	if(!ui)
 		ui = new(user, src, "NTNetRelay")
 		ui.open()
 
-/obj/machinery/ntnet_relay/ui_data(mob/user)
+/obj/structure/machinery/ntnet_relay/ui_data(mob/user)
 	var/list/data = list()
 	data["enabled"] = enabled
 	data["dos_capacity"] = dos_capacity
@@ -84,7 +84,7 @@
 
 	return data
 
-/obj/machinery/ntnet_relay/ui_act(action, params)
+/obj/structure/machinery/ntnet_relay/ui_act(action, params)
 	. = ..()
 	if(.)
 		return
@@ -100,10 +100,10 @@
 		update_icon()
 		. = TRUE
 
-/obj/machinery/ntnet_relay/attack_hand(var/mob/living/user)
+/obj/structure/machinery/ntnet_relay/attack_hand(var/mob/living/user)
 	ui_interact(user)
 
-/obj/machinery/ntnet_relay/Initialize()
+/obj/structure/machinery/ntnet_relay/Initialize()
 	. = ..()
 	uid = gl_uid
 	gl_uid++
@@ -115,13 +115,13 @@
 		NTNet = GLOB.ntnet_global
 		GLOB.ntnet_global.add_log("New quantum relay activated. Current amount of linked relays: [NTNet.relays.len]")
 
-/obj/machinery/ntnet_relay/Destroy()
+/obj/structure/machinery/ntnet_relay/Destroy()
 	if(GLOB.ntnet_global)
 		GLOB.ntnet_global.relays.Remove(src)
 		GLOB.ntnet_global.add_log("Quantum relay connection severed. Current amount of linked relays: [NTNet.relays.len]")
 	return ..()
 
-/obj/machinery/ntnet_relay/attackby(obj/item/attacking_item, mob/user)
+/obj/structure/machinery/ntnet_relay/attackby(obj/item/attacking_item, mob/user)
 	if(attacking_item.tool_behaviour == TOOL_SCREWDRIVER)
 		attacking_item.play_tool_sound(get_turf(src), 50)
 		panel_open = !panel_open
@@ -136,7 +136,7 @@
 
 		for(var/atom/movable/A in component_parts)
 			A.forceMove(get_turf(src))
-		new /obj/machinery/constructable_frame/machine_frame(get_turf(src))
+		new /obj/structure/machinery/constructable_frame/machine_frame(get_turf(src))
 		qdel(src)
 		return
 	..()