Fix Cold damage contributing to stun buildup (#2070)

Stun is not able to build up stun. Only noticed this as it is mentioned in the helper text in-game and nowhere else
Presumably so it doesn't build up 2 different poise mechanics at the same time

Co-authored-by: LocalIdentity <localidentity2@gmail.com>

Author: LocalIdentity

src/Modules/CalcOffence.lua

@@ -5353,7 +5353,7 @@ function calcs.offence(env, actor, activeSkill)
 			output["ChillChanceOnCrit"] = 0
 			skillFlags["inflictChill"] = false
 		end
-		-- TODO: Freeze and Electrocute are unhandled, should use similar system as Stun
+		
 		output["FreezeChanceOnHit"] = 0
 		output["FreezeChanceOnCrit"] = 0
 		skillFlags["inflictFreeze"] = false

src/Modules/CalcSetup.lua

@@ -90,6 +90,7 @@ function calcs.initModDB(env, modDB)
 	modDB:NewMod("MassiveShrine", "FLAG", true, "Base", { type = "Condition", var = "MassiveShrine" })
 	modDB:NewMod("AlchemistsGenius", "FLAG", true, "Base", { type = "Condition", var = "AlchemistsGenius" })
 	modDB:NewMod("LuckyHits", "FLAG", true, "Base", { type = "Condition", var = "LuckyHits" })
+	modDB:NewMod("ColdCannotHeavyStun", "FLAG", true)
 	modDB:NewMod("Convergence", "FLAG", true, "Base", { type = "Condition", var = "Convergence" })
 	modDB:NewMod("PhysicalDamageReduction", "BASE", -15, "Base", { type = "Condition", var = "Crushed" })
 	modDB:NewMod("CritChanceCap", "BASE", 100, "Base")