Weapons Racks (#19338)

Added weapons racks, can be locked/unlocked with an ID card.
Added weapons racks sprites, from Wezzy.
Refactored some circuitboard code, moved the defines, applied the
defines, DMDocs.
Moved mutable appearance appearance flag set to the mutable appearance
file.
Reorganized the Horizon armory with the weapons racks, moved things
around, put down markers on lockers depending on the danger level of
their content, reorganized content of the remaining lockers.
Made weapons racks constructable with circuitboards.


![image](https://github.com/Aurorastation/Aurora.3/assets/65877598/8b4ec7ae-40c4-4cd7-b338-76120d468b90)

![image](https://github.com/Aurorastation/Aurora.3/assets/65877598/a69d1f85-c4b2-4643-af2b-6832e3ea2c43)

![image](https://github.com/Aurorastation/Aurora.3/assets/65877598/11c1afe4-0fa1-4708-8eb4-64e1f5594913)

sound/items/metal_shutter.ogg -
https://freesound.org/people/bruno.auzet/sounds/524695/ (CC0, sound was
edited)

code/modules/power/tesla/coil.dm

@@ -106,7 +106,7 @@
 	build_path = /obj/machinery/power/tesla_coil
 	origin_tech = list(TECH_MAGNET = 2, TECH_ENGINEERING = 2)
 	req_components = list("/obj/item/stock_parts/capacitor" = 1)
-	board_type = "machine"
+	board_type = BOARD_MACHINE
 
 /obj/item/circuitboard/grounding_rod
 	name = "grounding rod circuitry"
@@ -114,4 +114,4 @@
 	build_path = /obj/machinery/power/grounding_rod
 	origin_tech = list(TECH_MAGNET = 2, TECH_ENGINEERING = 2)
 	req_components = list("/obj/item/stock_parts/capacitor" = 1)
-	board_type = "machine"
+	board_type = BOARD_MACHINE