Corrects mining export names on icebox (#91145)

## About The Pull Request

Closes #90666, converts minetypes to defines, gives icebox a minetype
define which could also be used later to give mining suits some fur or
something.

## Changelog
🆑
fix: Icebox artifact exports no longer claim they're from a lava planet
/🆑

_maps/icebox.json

@@ -40,7 +40,7 @@
 			"No Parallax": true
 		}
 	],
-	"minetype": "none",
+	"minetype": "ice",
 	"blacklist_file": "iceruinblacklist.txt",
 	"job_changes": {
 		"Captain": {

code/__DEFINES/maps.dm

@@ -242,3 +242,8 @@ Always compile, always use that verb, and always make sure that it works for wha
 #define AWAYSTART_SNOWCABIN "AWAYSTART_SNOWCABIN"
 #define AWAYSTART_SNOWDIN "AWAYSTART_SNOWDIN"
 #define AWAYSTART_UNDERGROUND "AWAYSTART_UNDERGROUND"
+
+// Minetypes for maps
+#define MINETYPE_NONE "none"
+#define MINETYPE_LAVALAND "lavaland"
+#define MINETYPE_ICE "ice"

code/controllers/subsystem/mapping.dm

@@ -448,9 +448,9 @@ Used by the AI doomsday and the self-destruct nuke.
 
 #ifndef LOWMEMORYMODE
 
-	if(current_map.minetype == "lavaland")
+	if(current_map.minetype == MINETYPE_LAVALAND)
 		LoadGroup(FailedZs, "Lavaland", "map_files/Mining", "Lavaland.dmm", default_traits = ZTRAITS_LAVALAND)
-	else if (!isnull(current_map.minetype) && current_map.minetype != "none")
+	else if (!isnull(current_map.minetype) && current_map.minetype != MINETYPE_NONE && current_map.minetype != MINETYPE_ICE)
 		INIT_ANNOUNCE("WARNING: An unknown minetype '[current_map.minetype]' was set! This is being ignored! Update the maploader code!")
 #endif
 
@@ -511,7 +511,7 @@ GLOBAL_LIST_EMPTY(the_station_areas)
 /datum/controller/subsystem/mapping/proc/preloadRuinTemplates()
 	// Still supporting bans by filename
 	var/list/banned = generateMapList("spaceruinblacklist.txt")
-	if(current_map.minetype == "lavaland")
+	if(current_map.minetype == MINETYPE_LAVALAND)
 		banned += generateMapList("lavaruinblacklist.txt")
 	else if(current_map.blacklist_file)
 		banned += generateMapList(current_map.blacklist_file)

code/datums/map_config.dm

@@ -31,7 +31,7 @@
 	var/planetary = FALSE
 
 	///The type of mining Z-level that should be loaded.
-	var/minetype = "lavaland"
+	var/minetype = MINETYPE_LAVALAND
 	///If no minetype is set, this will be the blacklist file used
 	var/blacklist_file
 

code/modules/cargo/exports/lavaland.dm

@@ -1,9 +1,26 @@
 //Tendril chest artifacts and ruin loot.
 //Consumable or one-use items like the magic D20 and gluttony's blessing are omitted
+/datum/export/lavaland
+	unit_name = "lava planet artifact"
+	/// Prefix to add to our unit name after generation
+	var/prefix = null
+
+/datum/export/lavaland/New()
+	. = ..()
+	switch (SSmapping.current_map.minetype)
+		if (MINETYPE_NONE)
+			unit_name = "unknown artifact"
+		if (MINETYPE_LAVALAND)
+			unit_name = "lava planet artifact"
+		if (MINETYPE_ICE)
+			unit_name = "ice moon artifact"
+
+	if (prefix)
+		unit_name = "[prefix] [unit_name]"
 
 /datum/export/lavaland/minor
 	cost = CARGO_CRATE_VALUE * 20
-	unit_name = "minor lava planet artifact"
+	prefix = "minor"
 	export_types = list(
 		/obj/item/immortality_talisman,
 		/obj/item/book_of_babel,
@@ -31,7 +48,6 @@
 
 /datum/export/lavaland/major //valuable chest/ruin loot, minor megafauna loot
 	cost = CARGO_CRATE_VALUE * 40
-	unit_name = "lava planet artifact"
 	export_types = list(
 		/obj/item/dragons_blood,
 		/obj/item/guardian_creator/miner,
@@ -48,7 +64,7 @@
 
 /datum/export/lavaland/megafauna
 	cost = CARGO_CRATE_VALUE * 80
-	unit_name = "major lava planet artifact"
+	prefix = "major"
 	export_types = list(
 		/obj/item/hierophant_club,
 		/obj/item/melee/cleaving_saw,