Split weapons_and_items.dmi icons into their own categories (#74363)

## About The Pull Request
This sprite file had been a dumping ground for miscellaneous sprites for
the past decade. It's bloated and full of random kinds of icons and even
has a few unused ones. It's time to reorganize them into their own
separate dmi's based on theme.

## Why It's Good For The Game
Better organization and easier access when looking for stuff.

## Changelog
🆑
imageadd: Split all icons in weapons_and_items.dmi to their own
categories
imagedel: Removed some unused icons
/🆑

code/modules/mapfluff/ruins/spaceruin_code/derelict_sulaco.dm

@@ -8,17 +8,17 @@
 /obj/item/paper/ruins/derelict_sulaco/birthday
 	name = "to our captain"
 	desc = "Although faint, you can make out the words 'always faithful!' on the back of this photo."
-	icon = 'icons/obj/weapons/items_and_weapons.dmi'
+	icon = 'icons/obj/art/camera.dmi'
 	icon_state = "photo"
 	show_written_words = FALSE
-	
+
 	default_raw_text = "*This looks to be a photo of the captain's birthday, held in a festivized cafeteria. The crew's smiles and laughter beam through discolored film, where one staff officer has his superior enveloped in a warm hug. Everyone looks happy together. A gift is being forced into the captain's hands: some silly, mischievous-looking 'runner' plushie.*"
 
 /obj/item/clothing/suit/armor/vest/marine/sulaco
 	name = "damaged tactical armor vest"
 	desc = "An old, roughed up set of the finest mass produced, stamped plasteel armor. This piece of equipment has lost most of its protective qualities to time, yet it is still more than serviceable for giving xenos the middle finger."
 	armor_type = /datum/armor/derelict_marine
- 
+
 /obj/item/clothing/head/helmet/marine/sulaco
 	name = "damaged tactical combat helmet"
 	desc = "A tactical black helmet, barely sealed from outside hazards with a plate of glass and not much else. Not as protective as it used to be, but it is still completely functional."
@@ -30,7 +30,7 @@
 	bio = 100
 	fire = 40
 	acid = 50
-	wound = 20	
+	wound = 20
 
 /obj/machinery/computer/terminal/sulaco
 	tguitheme = "abductor"

code/modules/mapfluff/ruins/spaceruin_code/hilbertshotel.dm

@@ -4,6 +4,7 @@ GLOBAL_VAR_INIT(hhMysteryRoomNumber, rand(1, 999999))
 /obj/item/hilbertshotel
 	name = "Hilbert's Hotel"
 	desc = "A sphere of what appears to be an intricate network of bluespace. Observing it in detail seems to give you a headache as you try to comprehend the infinite amount of infinitesimally distinct points on its surface."
+	icon = 'icons/obj/objects.dmi'
 	icon_state = "hilbertshotel"
 	w_class = WEIGHT_CLASS_SMALL
 	resistance_flags = INDESTRUCTIBLE | LAVA_PROOF | FIRE_PROOF | UNACIDABLE | ACID_PROOF