Create a Armor CoeffientQuery (#35024)

* Create a Armor CoeffientQuery

- add Armor Coefficent Query Event for InventoryRelay system

* CR - cleanup, comments and fix typos

* CR - Remove Whitespace

* typos

* on't

---------

Co-authored-by: ScarKy0 <106310278+ScarKy0@users.noreply.github.com>

Content.Shared/Armor/ArmorComponent.cs

@@ -1,4 +1,5 @@
 using Content.Shared.Damage;
+using Content.Shared.Inventory;
 using Robust.Shared.GameStates;
 using Robust.Shared.Utility;
 
@@ -30,3 +31,24 @@ public sealed partial class ArmorComponent : Component
 /// <param name="Msg"></param>
 [ByRefEvent]
 public record struct ArmorExamineEvent(FormattedMessage Msg);
+
+/// <summary>
+/// A Relayed inventory event, gets the total Armor for all Inventory slots defined by the Slotflags in TargetSlots
+/// </summary>
+public sealed class CoefficientQueryEvent : EntityEventArgs, IInventoryRelayEvent
+{
+    /// <summary>
+    /// All slots to relay to
+    /// </summary>
+    public SlotFlags TargetSlots { get; set; }
+
+    /// <summary>
+    /// The Total of all Coefficients.
+    /// </summary>
+    public DamageModifierSet DamageModifiers { get; set; } = new DamageModifierSet();
+
+    public CoefficientQueryEvent(SlotFlags slots)
+    {
+        TargetSlots = slots;
+    }
+}