add an event to prevent gun shooting (#17104)

Co-authored-by: deltanedas <@deltanedas:kde.org>

Content.Shared/Weapons/Ranged/Systems/SharedGunSystem.cs

@@ -221,8 +221,13 @@ public abstract partial class SharedGunSystem : EntitySystem
 
         var curTime = Timing.CurTime;
 
-        // Maybe Raise an event for this? CanAttack doesn't seem appropriate.
-        if (TryComp<MeleeWeaponComponent>(gunUid, out var melee) && melee.NextAttack > curTime)
+        // check if anything wants to prevent shooting
+        var prevention = new ShotAttemptedEvent
+        {
+            User = user
+        };
+        RaiseLocalEvent(gunUid, ref prevention);
+        if (prevention.Cancelled)
             return;
 
         // Need to do this to play the clicking sound for empty automatic weapons