Mobstate Refactor (#13389)

Refactors mobstate and moves mob health thresholds to their own component

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

Content.Shared/Mobs/MobState.cs

@@ -0,0 +1,43 @@
+using Content.Shared.Mobs.Components;
+using Robust.Shared.Serialization;
+
+namespace Content.Shared.Mobs;
+
+/// <summary>
+///     Defines what state an <see cref="Robust.Shared.GameObjects.EntityUid"/> is in.
+///
+///     Ordered from most alive to least alive.
+///     To enumerate them in this way see
+///     <see cref="MobStateHelpers.AliveToDead"/>.
+/// </summary>
+[Serializable, NetSerializable]
+public enum MobState : byte
+{
+    Invalid = 0,
+    Alive = 1,
+    Critical = 2,
+    Dead = 3
+}
+
+/// <summary>
+/// Event that is raised whenever a MobState changes on an entity
+/// </summary>
+/// <param name="Target">The Entity whose MobState is changing</param>
+/// <param name="Component">The MobState Component owned by the Target entity</param>
+/// <param name="OldMobState">The previous MobState</param>
+/// <param name="NewMobState">The new MobState</param>
+/// <param name="Origin">The Entity that caused this state change</param>
+public record struct MobStateChangedEvent(EntityUid Target, MobStateComponent Component, MobState OldMobState,
+    MobState NewMobState, EntityUid? Origin = null);
+
+public static class A
+{
+    //^.^
+}
+
+//This is dumb and I hate it but I don't feel like refactoring this garbage
+[Serializable, NetSerializable]
+public enum MobStateVisuals : byte
+{
+    State
+}