Adds a new Lavaland Ruin, the Elephant Graveyard (#47325)

* Initial Commit, Features the Map, Map specific files, changes to a metric ton of icons, etc.

* Fixes merge conflict, actually adds the map

* Spelling is hard Part 1

* Alright, steps are bad. Got it.

* Clean slate, please pretend to compile

* dme issue

* Fixes it for lavaland elites PR

* Removes the last dirty step_x, removes duplicate file, makes treavor happy

* Fixes some newline issues.

* Fixes some types, spawns skeletons in select graves since mob_spawns kept shoving them outside.

* Makes bone statues and shovel actually craftable, cleans up some comments.

* Properly defines muddy paper, updates map, fixes a few more typos.

* Prevents some future turf atmos issues, finally touched up the two skull sprites.

* Refactors strong mineral drops, cleans up some duplicate code, prevents washing hands with OIL

* I swear officer, i'm a native english speaker, fixes remains dropping correctly, un-nests my Ifs further.

* Oil well now covers target in oil when interacting with it.

* Refactors sink deconstruction a bit, oil wells can't be constructed with a wrench.

* Cleans up some atmos, and adds a return

* Adds subtype of remains for use in graves, move their spawn to src, not loc

* Moves around remains spawn, gets rid of untouched var

code/modules/paperwork/paper.dm

@@ -376,3 +376,6 @@
 
 /obj/item/paper/crumpled/bloody
 	icon_state = "scrap_bloodied"
+
+/obj/item/paper/crumpled/muddy
+	icon_state = "scrap_mud"