重构了底层，方便向Android、Web、Linux进行跨平台迁移

Library/NodeAttribute.cs

@@ -24,6 +24,8 @@ namespace Serein.Library.Attributes
         public bool Scan { get; set; } = true;
     }
 
+
+
     /// <summary>
     /// 标记一个方法是什么类型，加载dll后用来拖拽到画布中
     /// </summary>
@@ -40,10 +42,14 @@ namespace Serein.Library.Attributes
             MethodTips = methodTips;
             LockName = lockName;
         }
-        public bool Scan { get; set; }
-        public string MethodTips { get; }
-        public NodeType MethodDynamicType { get; }
-        public string LockName { get; }
+        public bool Scan;
+        public string MethodTips;
+        public NodeType MethodDynamicType;
+        /// <summary>
+        /// 推荐触发器手动设置返回类型
+        /// </summary>
+        public Type ReturnType;
+        public string LockName;
     }
 
 }