feat: implement extern block reading and parsing

src/compiler/main.c

@@ -200,7 +200,7 @@ int main(int argc, char **argv)
     {
       if (i > 0 && i < walker->op_count)
         printf("->");
-      printf("%lu", walker->ops[i]);
+      printf("%lX", walker->ops[i]);
     }
     printf("\n");