Implements jungle generation and area map generator datums (#51082)

code/controllers/subsystem/mapping.dm

@@ -34,6 +34,9 @@ SUBSYSTEM_DEF(mapping)
 	var/list/reservation_ready = list()
 	var/clearing_reserved_turfs = FALSE
 
+	///All possible biomes in assoc list as type || instance
+	var/list/biomes = list()
+
 	// Z-manager stuff
 	var/station_start  // should only be used for maploading-related tasks
 	var/space_levels_so_far = 0
@@ -61,6 +64,7 @@ SUBSYSTEM_DEF(mapping)
 		if(!config || config.defaulted)
 			to_chat(world, "<span class='boldannounce'>Unable to load next or default map config, defaulting to Meta Station</span>")
 			config = old_config
+	initialize_biomes()
 	loadWorld()
 	repopulate_sorted_areas()
 	process_teleport_locs()			//Sets up the wizard teleport locations
@@ -551,7 +555,11 @@ GLOBAL_LIST_EMPTY(the_station_areas)
 	used_turfs.Cut()
 	reserve_turfs(clearing)
 
-
+///Initialize all biomes, assoc as type || instance
+/datum/controller/subsystem/mapping/proc/initialize_biomes()
+	for(var/biome_path in subtypesof(/datum/biome))
+		var/datum/biome/biome_instance = new biome_path()
+		biomes[biome_path] += biome_instance
 
 /datum/controller/subsystem/mapping/proc/reg_in_areas_in_z(list/areas)
 	for(var/B in areas)