Mobstate Refactor (#13389)

Refactors mobstate and moves mob health thresholds to their own component

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

Content.Server/Pointing/EntitySystems/RoguePointingSystem.cs

@@ -1,7 +1,6 @@
 using System.Linq;
 using Content.Server.Explosion.EntitySystems;
 using Content.Server.Pointing.Components;
-using Content.Shared.MobState.Components;
 using Content.Shared.Pointing.Components;
 using JetBrains.Annotations;
 using Robust.Server.GameObjects;