A simple nu plugin that invokes the native file dialog of the os through native-dialog-rs.
Works on windows (tested) and should work on GNU/Linux and BSD Unix. Doesn't work on macOS because UI elements can't be spawned on a non-main thread.
cargo install nu_plugin_file_dialog
plugin add ~/.cargo/bin/nu_plugin_file_dialog
run file-dialog --help
to get the parameters and examples.