Severely nerf fires and severely buff fire protection (#5396)

* Make fires do less damage

* Severely nerf fires and severely buff temperature protection

* fuck it, i'll nerf it so hard and we can buff it later if we decide

* new scaling func

* fix

* unused

* reviews + balance metabolism heat + reduce atmos air temp transfer efficiency

* little more balance

* just a wee bit more

* slight adjustment

Content.Server/Atmos/Components/BarotraumaComponent.cs

@@ -1,4 +1,5 @@
 using Content.Shared.Damage;
+using Content.Shared.FixedPoint;
 using Robust.Shared.GameObjects;
 using Robust.Shared.Serialization.Manager.Attributes;
 using Robust.Shared.ViewVariables;
@@ -19,6 +20,6 @@ namespace Content.Server.Atmos.Components
 
         [DataField("maxDamage")]
         [ViewVariables(VVAccess.ReadWrite)]
-        public int MaxDamage = 200;
+        public FixedPoint2 MaxDamage = 200;
     }
 }