Fix C++ standard library include

Author: LinZhihao-723

components/core/src/clp/ir/parsing.cpp

@@ -1,5 +1,8 @@
 #include "parsing.hpp"
 
+#include <string>
+#include <string_view>
+
 #include <string_utils/string_utils.hpp>
 
 #include "../type_utils.hpp"

components/core/src/clp/ir/parsing.hpp

@@ -9,8 +9,9 @@
  * the placement of the methods in this file.
  */
 
+#include <cstddef>
+#include <string>
 #include <string_view>
-#include <vector>
 
 namespace clp::ir {
 /**

components/core/src/clp/ir/parsing.inc

@@ -1,6 +1,7 @@
 #ifndef CLP_IR_PARSING_INC
 #define CLP_IR_PARSING_INC
 
+#include <cstddef>
 #include <string>
 #include <string_view>