New component: change alert level on trigger (#36581)

* adds component that lets change alert level on trigger

* oops, put stuff on wrong folder

* missclick, forgor a file

* slarti finds ways to improve code

* Apply suggestions from code review

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Co-authored-by: slarticodefast <161409025+slarticodefast@users.noreply.github.com>

Content.Server/AlertLevel/AlertLevelSystem.cs

@@ -116,6 +116,20 @@ public sealed class AlertLevelSystem : EntitySystem
         return alert.CurrentDelay;
     }
 
+    /// <summary>
+    /// Get the default alert level for a station entity.
+    /// Returns an empty string if the station has no alert levels defined.
+    /// </summary>
+    /// <param name="station">The station entity.</param>
+    public string GetDefaultLevel(Entity<AlertLevelComponent?> station)
+    {
+        if (!Resolve(station.Owner, ref station.Comp) || station.Comp.AlertLevels == null)
+        {
+            return string.Empty;
+        }
+        return station.Comp.AlertLevels.DefaultLevel;
+    }
+
     /// <summary>
     /// Set the alert level based on the station's entity ID.
     /// </summary>