Ports large object transparency from TGMC (#21508)

Ports https://github.com/tgstation/TerraGov-Marine-Corps/pull/3528
Credit goes to original coders. This PR makes large objects transparent
when something important is behind it.

For now the list of large objects and the things make them transparent
by using this component as follows:

Large objects:

- Trees
- Cranes
- Old shipping containers (new ones doesn't allow anything to go behind
it)

The things make them transparent:
- Mobs
- Carts
- Portable generators
- Nuke

## Images


https://github.com/user-attachments/assets/a4f8ddfc-0fde-4b2d-8bd8-d15e1c6e8e0b

### Asset Licenses
The following assets that **have not** been created by myself are
included in this PR:

| Path | Original Author | License |
| --- | --- | --- |
| code/datums/components/large_object_transparency.dm | nemvar (TGMC) |
AGPLv3 |

code/game/objects/structures/carts/carts.dm

@@ -8,6 +8,7 @@ ABSTRACT_TYPE(/obj/structure/cart)
 	build_amt = 15
 	material = DEFAULT_WALL_MATERIAL
 	slowdown = 0
+	atom_flags = CRITICAL_ATOM
 	var/movesound = 'sound/effects/roll.ogg'
 	var/driving
 	var/mob/living/pulling

code/game/objects/structures/coastal.dm

@@ -45,3 +45,7 @@
 	density = TRUE
 	layer = 9
 	pixel_x = -16
+
+/obj/structure/crane/Initialize()
+	. = ..()
+	AddComponent(/datum/component/large_transparency)

code/game/objects/structures/urban.dm

@@ -416,6 +416,10 @@ ABSTRACT_TYPE(/obj/structure/stairs/urban/road_ramp)
 	density = TRUE
 	layer = ABOVE_HUMAN_LAYER
 
+/obj/structure/shipping_container_old/Initialize()
+	. = ..()
+	AddComponent(/datum/component/large_transparency)
+
 /obj/effect/overlay/container_logo
 	name = "Hephaestus Industries emblem"
 	icon = 'icons/obj/structure/industrial/shipping_containers_old.dmi'