Deathgasp + last words / succumbing / fake deathgasp as crit actions (#18993)

Content.Server/Mobs/DeathgaspComponent.cs

@@ -0,0 +1,18 @@
+using Content.Shared.Chat.Prototypes;
+using Robust.Shared.Serialization.TypeSerializers.Implementations.Custom.Prototype;
+
+namespace Content.Server.Mobs;
+
+/// <summary>
+///     Mobs with this component will emote a deathgasp when they die.
+/// </summary>
+/// <see cref="DeathgaspSystem"/>
+[RegisterComponent]
+public sealed class DeathgaspComponent : Component
+{
+    /// <summary>
+    ///     The emote prototype to use.
+    /// </summary>
+    [DataField("prototype", customTypeSerializer:typeof(PrototypeIdSerializer<EmotePrototype>))]
+    public string Prototype = "DefaultDeathgasp";
+}