暂时实现了简陋的脚本AST分析解释，后面再绑定到控件上

Library/Api/IScriptFlowApi.cs

@@ -0,0 +1,58 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Serein.Library.Api
+{
+    /// <summary>
+    /// 脚本代码中关于流程运行的API
+    /// </summary>
+    public interface IScriptFlowApi
+    {
+        /// <summary>
+        /// 当前流程
+        /// </summary>
+        IFlowEnvironment Env { get; }
+        /// <summary>
+        /// 对应的节点
+        /// </summary>
+        NodeModelBase NodeModel { get; }
+
+        /// <summary>
+        /// 动态流程上下文
+        /// </summary>
+        IDynamicContext Context { get; set; }
+
+        /// <summary>
+        /// 根据索引从入参数据获取数据 
+        /// </summary>
+        /// <param name="index"></param>
+        /// <returns></returns>
+        object GetDataOfParams(int index);
+        /// <summary>
+        /// 根据入参名称从入参数据获取数据
+        /// </summary>
+        /// <param name="name"></param>
+        /// <returns></returns>
+        object GetDataOfParams(string name);
+        /// <summary>
+        /// 获取全局数据
+        /// </summary>
+        /// <param name="keyName"></param>
+        /// <returns></returns>
+        object GetGlobalData(string keyName);
+        /// <summary>
+        /// 获取流程当前传递的数据
+        /// </summary>
+        /// <returns></returns>
+        object GetFlowData();
+        /// <summary>
+        /// 立即调用某个节点并获取其返回值
+        /// </summary>
+        /// <param name="nodeGuid"></param>
+        /// <returns></returns>
+        Task<object> CallNode(string nodeGuid);
+    }
+}