TriggerOnSpawn + Admin toys (#23999)

* spawn on trigger, or trigger on spawn?

* fixes

* fix?

* revert

* fixes

* Update admin_triggers.yml

* pip

Content.Server/Explosion/Components/TriggerOnSpawnComponent.cs

@@ -0,0 +1,9 @@
+namespace Content.Server.Explosion.Components;
+
+/// <summary>
+/// calls the trigger when the object is initialized
+/// </summary>
+[RegisterComponent]
+public sealed partial class TriggerOnSpawnComponent : Component
+{
+}

Content.Server/Explosion/EntitySystems/TriggerSystem.cs

@@ -78,6 +78,7 @@ namespace Content.Server.Explosion.EntitySystems
             InitializeVoice();
             InitializeMobstate();
 
+            SubscribeLocalEvent<TriggerOnSpawnComponent, MapInitEvent>(OnSpawnTriggered);
             SubscribeLocalEvent<TriggerOnCollideComponent, StartCollideEvent>(OnTriggerCollide);
             SubscribeLocalEvent<TriggerOnActivateComponent, ActivateInWorldEvent>(OnActivate);
             SubscribeLocalEvent<TriggerImplantActionComponent, ActivateImplantEvent>(OnImplantTrigger);
@@ -193,6 +194,11 @@ namespace Content.Server.Explosion.EntitySystems
                 Trigger(uid);
         }
 
+        private void OnSpawnTriggered(EntityUid uid, TriggerOnSpawnComponent component, MapInitEvent args)
+        {
+            Trigger(uid);
+        }
+
         private void OnActivate(EntityUid uid, TriggerOnActivateComponent component, ActivateInWorldEvent args)
         {
             Trigger(uid, args.User);