Scripts/AreaTrigger: Added CanCaptureFlag and CaptureFlag hooks

Port From (https://github.com/TrinityCore/TrinityCore/commit/30f57de184fb96dfb6c548201e7717fa293682e1)

Source/Game/Maps/ZoneScript.cs

@@ -46,6 +46,9 @@ namespace Game.Maps
 
         public virtual void OnFlagStateChange(GameObject flagInBase, FlagState oldValue, FlagState newValue, Player player) { }
 
+        public virtual bool CanCaptureFlag(AreaTrigger areaTrigger, Player player) { return false; }
+        public virtual void OnCaptureFlag(AreaTrigger areaTrigger, Player player) { }
+
         protected EventMap _events = new();
     }
 }

Source/Scripts/World/AreaTrigger.cs

@@ -2,12 +2,13 @@
 // Licensed under the GNU GENERAL PUBLIC LICENSE. See LICENSE file in the project root for full license information.
 
 using Framework.Constants;
+using Game.AI;
 using Game.DataStorage;
 using Game.Entities;
+using Game.Maps;
 using Game.Scripting;
-using System.Collections.Generic;
-using Game.AI;
 using System;
+using System.Collections.Generic;
 
 namespace Scripts.World.Areatriggers
 {
@@ -433,4 +434,21 @@ namespace Scripts.World.Areatriggers
             return true;
         }
     }
+
+    [Script]
+    class areatrigger_action_capture_flag : AreaTriggerAI
+    {
+        public areatrigger_action_capture_flag(AreaTrigger areatrigger) : base(areatrigger) { }
+
+        public override void OnUnitEnter(Unit unit)
+        {
+            if (!unit.IsPlayer())
+                return;
+
+            Player player = unit.ToPlayer();
+            ZoneScript zoneScript = at.GetZoneScript();
+            if (zoneScript != null && zoneScript.CanCaptureFlag(at, player))
+                zoneScript.OnCaptureFlag(at, player);
+        }
+    }
 }