Armor (#4934)

* Armor

* radiation tweaks

* asphyxiation ignore resistances

Content.Server/Armor/ArmorComponent.cs

@@ -0,0 +1,15 @@
+using Content.Shared.Damage;
+using Robust.Shared.GameObjects;
+using Robust.Shared.Serialization.Manager.Attributes;
+
+namespace Content.Server.Armor
+{
+    [RegisterComponent]
+    public class ArmorComponent : Component
+    {
+        public override string Name => "Armor";
+
+        [DataField("modifiers", required: true)]
+        public DamageModifierSet Modifiers = default!;
+    }
+}

Content.Server/Armor/ArmorSystem.cs

@@ -0,0 +1,20 @@
+using Content.Shared.Damage;
+using Robust.Shared.GameObjects;
+
+namespace Content.Server.Armor
+{
+    public class ArmorSystem : EntitySystem
+    {
+        public override void Initialize()
+        {
+            base.Initialize();
+
+            SubscribeLocalEvent<ArmorComponent, DamageModifyEvent>(OnDamageModify);
+        }
+
+        private void OnDamageModify(EntityUid uid, ArmorComponent component, DamageModifyEvent args)
+        {
+            args.Damage = DamageSpecifier.ApplyModifierSet(args.Damage, component.Modifiers);
+        }
+    }
+}