暂时实现了简陋的脚本AST分析解释，后面再绑定到控件上

Serein.Script/Node/IdentifierNode.cs

@@ -0,0 +1,17 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Serein.Script.Node
+{
+    /// <summary>
+    /// 标识符（变量）
+    /// </summary>
+    public class IdentifierNode : ASTNode
+    {
+        public string Name { get; }
+        public IdentifierNode(string name) => Name = name;
+    }
+}