Armor price calculations (#11417)

Co-authored-by: CommieFlowers <rasmus.cedergren@hotmail.com>
fixes https://github.com/space-wizards/space-station-14/issues/11299

Content.Shared/Damage/Prototypes/DamageTypePrototype.cs

@@ -12,5 +12,17 @@ namespace Content.Shared.Damage.Prototypes
     {
         [IdDataFieldAttribute]
         public string ID { get; } = default!;
+
+        /// <summary>
+        /// The price for each 1% damage reduction in armors
+        /// </summary>
+        [DataField("armorCoefficientPrice")]
+        public double ArmorPriceCoefficient { get; set; }
+
+        /// <summary>
+        /// The price for each flat damage reduction in armors
+        /// </summary>
+        [DataField("armorFlatPrice")]
+        public double ArmorPriceFlat { get; set; }
     }
 }