Add OpenDoorActionResource and integrate into TriggerActionFactory

Code/Resources/OpenDoorActionResource.cs

@@ -0,0 +1,9 @@
+using Godot;
+
+namespace CryptonymThunder.Code.Resources;
+
+[GlobalClass]
+public partial class OpenDoorActionResource : TriggerActionResource
+{
+    [Export] public string TargetWorldId { get; set; } = "door_to_open";
+}