Status effect refactor (#4868)

* Oops! All Changes In One Commit

* try desperately to fix prediction issues and fail

* oops

* test

* actually fixes prediction issues

* port jittering to status effect

* default merge behavior + alert cooldown stuff

* silly test issue

* zabloing

* address reviews

Content.Server/DoAfter/DoAfter.cs

@@ -136,8 +136,7 @@ namespace Content.Server.DoAfter
             }
 
             if (EventArgs.BreakOnStun &&
-                entityManager.TryGetComponent(EventArgs.User, out StunnableComponent? stunnableComponent) &&
-                stunnableComponent.Stunned)
+                entityManager.HasComponent<StunnedComponent>(EventArgs.User))
             {
                 return true;
             }