Added Pain Numbness Trait (#34538)

* added pain-numbness component and system

* added numb as a trait that pulls the pain numbness component

* removed new event as mob threshold event as already being fired

* checked for MobThresholdsComponent first before running VerifyThresholds

* refacted force say to using LocalizedDatasetPrototype and added numb messages

* added severity check alert

* added comment for BeforeForceSayEvent

* removed space formatting

* changed Cancelled to CancelUpdate, fixed spacing and added two more damage-force-say-numb

* changed prefix damage-force-say-numb to 5 (whoops)

Content.Shared/Mobs/Systems/MobThresholdSystem.cs

@@ -4,6 +4,7 @@ using Content.Shared.Alert;
 using Content.Shared.Damage;
 using Content.Shared.FixedPoint;
 using Content.Shared.Mobs.Components;
+using Content.Shared.Mobs.Events;
 using Robust.Shared.GameStates;
 
 namespace Content.Shared.Mobs.Systems;
@@ -391,6 +392,16 @@ public sealed class MobThresholdSystem : EntitySystem
         if (alertPrototype.SupportsSeverity)
         {
             var severity = _alerts.GetMinSeverity(currentAlert);
+
+            var ev = new BeforeAlertSeverityCheckEvent(currentAlert, severity);
+            RaiseLocalEvent(target, ev);
+
+            if (ev.CancelUpdate)
+            {
+                _alerts.ShowAlert(target, ev.CurrentAlert, ev.Severity);
+                return;
+            }
+
             if (TryGetNextState(target, currentMobState, out var nextState, threshold) &&
                 TryGetPercentageForState(target, nextState.Value, damageable.TotalDamage, out var percentage))
             {