io to its own file

board-builder-gui/src/main.rs

@@ -7,7 +7,8 @@ use image::DynamicImage;
 
 use rfd::FileDialog;
 
-use board_builder::{ Board, Node, CoordTransformer, read_board_from_file, write_board_to_file };
+use board_builder::{ Board, Node, CoordTransformer };
+use board_builder::io::{ read_board_from_file, write_board_to_file };
 
 use std::path::Path;
 use std::collections::HashSet;