Mobstate Refactor (#13389)

Refactors mobstate and moves mob health thresholds to their own component

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

Content.Shared/Verbs/Verb.cs

@@ -1,6 +1,7 @@
 using Robust.Shared.Serialization;
 using Robust.Shared.Utility;
 using Content.Shared.Database;
+using Content.Shared.Interaction.Events;
 
 namespace Content.Shared.Verbs
 {