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

Content.Shared/Mobs/Components/MobStateActionsComponent.cs

@@ -0,0 +1,27 @@
+using Content.Shared.Mobs.Systems;
+
+namespace Content.Shared.Mobs.Components;
+
+/// <summary>
+///     Used for specifying actions that should be automatically added/removed on mob state transitions
+/// </summary>
+/// <remarks>
+///     Mostly for crit-specific actions.
+/// </remarks>
+/// <see cref="MobStateActionsSystem"/>
+[RegisterComponent]
+public sealed class MobStateActionsComponent : Component
+{
+    /// <summary>
+    ///     Specifies a list of actions that should be available if a mob is in a given state.
+    /// </summary>
+    /// <example>
+    /// actions:
+    ///   Critical:
+    ///   - CritSuccumb
+    ///   Alive:
+    ///   - AnimalLayEgg
+    /// </example>
+    [DataField("actions")]
+    public Dictionary<MobState, List<string>> Actions = new();
+}