Mobstate Refactor (#13389)

Refactors mobstate and moves mob health thresholds to their own component

Co-authored-by: DrSmugleaf <drsmugleaf@gmail.com>

Content.Shared/Mobs/Components/MobStateComponent.cs

@@ -0,0 +1,42 @@
+using Content.Shared.Damage;
+using Content.Shared.Mobs.Systems;
+using Robust.Shared.GameStates;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.Mobs.Components
+{
+    /// <summary>
+    ///     When attached to an <see cref="DamageableComponent"/>,
+    ///     this component will handle critical and death behaviors for mobs.
+    ///     Additionally, it handles sending effects to clients
+    ///     (such as blur effect for unconsciousness) and managing the health HUD.
+    /// </summary>
+    [RegisterComponent]
+    [NetworkedComponent]
+    [Access(typeof(MobStateSystem), typeof(MobThresholdSystem))]
+    public sealed class MobStateComponent : Component
+    {
+        //default mobstate is always the lowest state level
+        [ViewVariables] public MobState CurrentState { get; set; } = MobState.Alive;
+
+        [DataField("allowedStates")] public HashSet<MobState> AllowedStates = new()
+            {
+                MobState.Alive,
+                MobState.Critical,
+                MobState.Dead
+            };
+    }
+
+    [Serializable, NetSerializable]
+    public sealed class MobStateComponentState : ComponentState
+    {
+        public readonly MobState CurrentState;
+        public readonly HashSet<MobState> AllowedStates;
+
+        public MobStateComponentState(MobState currentState, HashSet<MobState> allowedStates)
+        {
+            CurrentState = currentState;
+            AllowedStates = allowedStates;
+        }
+    }
+}