rename files based on their classes

include/util.hpp

@@ -24,6 +24,14 @@ struct overloads : Ts...
     using Ts::operator()...;
 };
 
+enum direction
+{
+    nor = 1 << 0,
+    eas = 1 << 1,
+    sou = 1 << 2,
+    wes = 1 << 3,
+};
+
 enum ctrl
 {
     reset = 0,
@@ -91,4 +99,4 @@ auto errln(std::format_string<Args...> fmt, Args&&... args) -> void
               << std::format(fmt, std::forward<Args>(args)...) << std::endl;
 }
 
-#endif
+#endif