refactor: 重命名文件和类

include/backwardad.hpp

@@ -1,7 +1,7 @@
 #pragma once
 #include <vector>
-#include "types/gradient.hpp"
-#include "gradient.hpp"
+#include "types/node.hpp"
+#include "node_ops.hpp"
 
 namespace backwardad {
 

include/forwardad.hpp

@@ -1,7 +1,7 @@
 /*前向自动微分的声明部分*/
 #pragma once
 #include <vector>
-#include "dual.hpp"
+#include "dual_ops.hpp"
 #include "types/common.hpp"
 
 namespace forwardad{

include/node_ops.hpp

@@ -1,5 +1,5 @@
 #pragma once
-#include "types/gradient.hpp"
+#include "types/node.hpp"
 
 namespace backwardad {
     inline Node operator+(const Node& a, const Node& b) {