Adds cybernetic lungs(and an upgraded and actually useful variety) to the game. (#30382)

* Adds cybernetic lungs

* Added better cold thresholds to the upgraded cybernetic lungs. Heat threshold remains the same though for balance reasons.

* Adds an EMP effect to cybernetic lungs.

code/modules/surgery/organs/lungs.dm

@@ -316,6 +316,29 @@
 	safe_toxins_min = 16 //We breath THIS!
 	safe_toxins_max = 0
 
+/obj/item/organ/lungs/cybernetic
+	name = "cybernetic lungs"
+	desc = "A cybernetic version of the lungs found in traditional humanoid entities. It functions the same as an organic lung and is merely meant as a replacement."
+	icon_state = "lungs-c"
+	origin_tech = "biotech=4"
+
+/obj/item/organ/lungs/cybernetic/emp_act()
+	owner.losebreath = 20
+
+
+/obj/item/organ/lungs/cybernetic/upgraded
+	name = "upgraded cybernetic lungs"
+	desc = "A more advanced version of the stock cybernetic lungs. They are capable of filtering out lower levels of toxins and carbon-dioxide."
+	icon_state = "lungs-c-u"
+	origin_tech = "biotech=5"
+
+	safe_toxins_max = 20
+	safe_co2_max = 20
+
+	cold_level_1_threshold = 200
+	cold_level_2_threshold = 140
+	cold_level_3_threshold = 100
+
 #undef HUMAN_MAX_OXYLOSS
 #undef HUMAN_CRIT_MAX_OXYLOSS
 #undef HEAT_GAS_DAMAGE_LEVEL_1