core: use enum to replace multiple define

src/main.🗿

@@ -1,6 +1,4 @@
-define LOCATION_LENGTH = 0;
-define LOCATION_CURRENT_LINE = 1;
-define LOCATION_ARRAY = 2;
+enum LOCATION_LENGTH, LOCATION_CURRENT_LINE, LOCATION_ARRAY;
 
 parsing(text, cmd_ptr)
 {