For the post editor, there is just wp_enqueue_editor(). The code editor currently has a wp_enqueue_code_editor() function that takes a $settings arg which has the configuration for the desired editor, which is then used to determine which scripts and styles get enqueued. The $settings array is generated by wp_code_editor_settings(). However, having two separate functions may not make sense, and perhaps the arg passed into wp_code_editor_settings() should just be what is passed into wp_enqueue_code_editor().

Additionally, the $context arg that is passed into wp_code_editor_settings() should maybe be cleaned up. If $context['file'] is always required, then maybe it should take a $file arg followed by a $context. Or maybe file shouldn't be required all, and it could accept a type instead, which would make some more sense in the case of Additional CSS and the Custom HTML widget.