Add footstep sounds to almost every single tile.

Shuttle tiles, default floors are still "regular".
Lava, sand, water, grass, beach, mining turfs all have sounds playing now for each footstep. <3

Massive credit to @Arokha for helping me figure out the floor system and sitting through getting it put together. <3 <3 <3

code/modules/mining/mine_turfs.dm

@@ -154,6 +154,8 @@ turf/simulated/mineral/floor/light_corner
 	if(random_icon)
 		dir = pick(alldirs)
 		. = INITIALIZE_HINT_LATELOAD
+	var/decl/flooring/F = get_flooring_data(/decl/flooring/sand)
+	footstep_sounds = F?.footstep_sounds
 
 /turf/simulated/mineral/LateInitialize()
 	if(density && mineral)