Adds a new Odyssey map: Decrepit Shipyard (#21500)

## About PR

Adds an industrial themed away site for Odyssey scenarios. The map
starts with a shuttle, broken by a randomized destruction feature.
Actors or the crew may choose to repair it to make it fly once more

### Detailed Changelog
<details><summary>Details</summary>
<p>

- Added a new map_effect, randomized destruction. It comes with two
varieties and different impact ranges. The way it work is the effect
chooses a random amount of turfs in the area it's placed on, and calls
`ex_act` on applicable contents in the turf.
- Added unused sprites for low railing and documented relevant functions
in the existing code.
- Made it so when a railing has an open end that doesn't connect to
anywhere, it'll apply an end cap, making it look more smooth.
- Added ceiling lattices.
- Adjusted unit tests to avoid conflicts that may occur with ceiling
lattices.
- Fixed a bug where the Odyssey subsystem repeatedly added lastly loaded
z-level to the scenario z-levels, instead of all relevant levels to the
site. This was causing issues in Odyssey maps with shuttles.
- Fixed hydrogen tank not using its sprite. Also recoloured the tank to
match modern hydrogen canister colour.
- Fixed `/obj/machinery/door/airlock/maintenance` not using its intended
appearance.

</p>
</details> 

## Images

<img width="4128" height="2528" alt="StrongDMM-2025-11-10 21 33 47"
src="https://github.com/user-attachments/assets/09d8b671-457c-4ec5-88ac-e503641a0531"
/>
<img width="3424" height="2016" alt="StrongDMM-2025-11-10 21 34 27"
src="https://github.com/user-attachments/assets/943b8529-7f2a-41db-a7be-e57d5d30ead7"
/>
<img width="1312" height="800" alt="StrongDMM-2025-11-10 21 34 52"
src="https://github.com/user-attachments/assets/f665800a-367b-466e-a16e-a6f0b122e3bd"
/>
<img width="997" height="999" alt="Screenshot_54"
src="https://github.com/user-attachments/assets/c06667c6-0dfc-4dc4-af67-821f36ad2933"
/>
<img width="997" height="1001" alt="Screenshot_55"
src="https://github.com/user-attachments/assets/848a2847-9eb0-450a-87e9-08c371aaf78a"
/>
<img width="998" height="992" alt="Screenshot_61"
src="https://github.com/user-attachments/assets/e6174cb5-d4d6-4afc-82ab-bbf412eda607"
/>
<img width="998" height="990" alt="Screenshot_63"
src="https://github.com/user-attachments/assets/cc838bdc-9e22-4aed-ad16-0f8722442b8a"
/>

code/datums/scenarios/scenario.dm

@@ -84,7 +84,7 @@
 	// load the site
 	var/list/bounds = scenario_site.load_new_z()
 	for(var/z_index in bounds[MAP_MINZ] to bounds[MAP_MAXZ])
-		SSodyssey.scenario_zlevels += world.maxz
+		SSodyssey.scenario_zlevels += z_index
 	base_area = new base_area()
 
 	// regenerate minimaps