重写了节点的view、viewmodel关系，实现了对画布元素的选取功能，重构了底层依赖，添加了对net .Framework4.6.1以上的Framework类库支持

Library/Enums/NodeType.cs

@@ -0,0 +1,38 @@
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace Serein.Library.Enums
+{
+    public enum NodeType
+    {
+        /// <summary>
+        /// 初始化
+        /// </summary>
+        Init,
+        /// <summary>
+        /// 开始载入
+        /// </summary>
+        Loading,
+        /// <summary>
+        /// 结束
+        /// </summary>
+        Exit,
+
+        /// <summary>
+        /// 触发器
+        /// </summary>
+        Flipflop,
+        /// <summary>
+        /// 条件节点
+        /// </summary>
+        Condition,
+        /// <summary>
+        /// 动作节点
+        /// </summary>
+        Action,
+    }
+
+}