Adding an option page

With ACF:

add_action( 'acf/init', 'dev__option_page' );

function dev__option_page(){

	acf_add_options_page( array(
		'page_title' 	=> 'Transfert Ressources',
		'menu_title'	=> 'Transfert de Ressources',
		'icon_url'		=> 'dashicons-update',
		'menu_slug' 	=> 'ator',
		'capability'	=> 'edit_posts',
		'redirect'		=> false
	));

}

See: https://www.advancedcustomfields.com/resources/acf_add_options_page/

Without ACF: https://codex.wordpress.org/Creating_Options_Pages