Alien Ruin fix, various cherrypicked upstream fixes

Also adds new buildmode

modular_citadel/code/modules/mining/mining_ruins.dm

@@ -0,0 +1,25 @@
+/datum/map_template/ruin/lavaland/alien_nest
+	name = "Alien Nest"
+	id = "alien-nest"
+	description = "Not even Necropolis is safe from alien infestation. The competition for hosts has locked the legion and aliens in an endless conflict that can only be resolved by a PKA."
+	suffix = "lavaland_surface_alien_nest.dmm"
+	cost = 20
+
+//Aliens for the alien nest space ruin.
+/obj/effect/mob_spawn/alien/corpse/humanoid/drone
+	mob_type = /mob/living/carbon/alien/humanoid/drone
+	death = TRUE
+	name = "alien drone"
+	mob_name = "alien drone"
+ /obj/effect/mob_spawn/alien/corpse/humanoid/queen
+	mob_type = /mob/living/carbon/alien/humanoid/royal/queen
+	death = TRUE
+	name = "alien queen"
+	mob_name = "alien queen"
+
+/obj/item/reagent_containers/syringe/alien
+	name = "Hive's Blessing"
+	desc = "A syringe filled with a strange viscous liquid. It might be best to leave it alone."
+	amount_per_transfer_from_this = 1
+	volume = 1
+	list_reagents = list("xenomicrobes" = 1)