Fix up special floors

Zennysoft.Game.Ma/src/map/dungeon/floors/Special Floors/Cellular.cs

@@ -0,0 +1,36 @@
+using Chickensoft.AutoInject;
+using Chickensoft.Introspection;
+using Godot;
+using System;
+using Zennysoft.Game.Ma;
+using Zennysoft.Ma.Adapter;
+
+[Meta(typeof(IAutoNode))]
+public partial class Cellular : SpecialFloor
+{
+  public override void _Notification(int what) => this.Notify(what);
+
+  [Node] private Area3D Exit { get; set; } = default!;
+
+  [Dependency] protected IGame Game => this.DependOn<IGame>();
+
+  public void OnResolved()
+  {
+    Show();
+    Exit.AreaEntered += Exit_AreaEntered;
+    FloorIsLoaded = true;
+  }
+
+  private void Exit_AreaEntered(Area3D area)
+  {
+    if (area.GetOwner() is IPlayer)
+      ExitReached();
+  }
+
+  public void ExitReached() => Game.FloorExitReached();
+
+  public void OnExitTree()
+  {
+    Exit.AreaEntered -= Exit_AreaEntered;
+  }
+}