add 新增远程连接，实现多人游戏

Scripts/Entities/ChessPiece.cs

@@ -35,6 +35,7 @@ public partial class ChessPiece : Sprite2D {
         if (isSelected) {
             return;
         }
+        GD.Print($"{arrPos} is selected");
         this.Transform *= transToSeleted;
         this.isSelected = true;
     }
@@ -43,6 +44,7 @@ public partial class ChessPiece : Sprite2D {
         if (!isSelected) {
             return;
         }
+        GD.Print($"{arrPos} is deselected");
         this.Transform *= transToSeleted.AffineInverse();
         this.isSelected = false;
     }
@@ -54,7 +56,7 @@ public partial class ChessPiece : Sprite2D {
 
     private void InitLabel() {
         // this.Texture.ResourcePath = "res://Asserts/ChesspieceBase.tres";
-        this.Texture = (Texture2D)ResourceLoader.Load("res://Asserts/ChesspieceBase.tres");
+        this.Texture ??= (Texture2D)ResourceLoader.Load("res://Asserts/ChesspieceBase.tres");
         textureSize = this.Texture.GetSize();
         Vector2 labalPosition = new(
                 -textureSize.X / 2,