Use red damage animation for guns too (#10938)

Content.Shared/Weapons/DamageEffectComponent.cs

@@ -0,0 +1,11 @@
+namespace Content.Shared.Weapons;
+
+/// <summary>
+/// Stores the original sprite color for a damaged entity to be able to restore it later.
+/// </summary>
+[RegisterComponent]
+public sealed class DamageEffectComponent : Component
+{
+    [ViewVariables]
+    public Color Color = Color.White;
+}

Content.Shared/Weapons/Melee/DamageEffectEvent.cs

@@ -0,0 +1,17 @@
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.Weapons.Melee;
+
+/// <summary>
+/// Raised on the server and sent to a client to play the damage animation.
+/// </summary>
+[Serializable, NetSerializable]
+public sealed class DamageEffectEvent : EntityEventArgs
+{
+    public EntityUid Entity;
+
+    public DamageEffectEvent(EntityUid entity)
+    {
+        Entity = entity;
+    }
+}