* emacs/guix-emacs.el: New file. * emacs.am (ELFILES): Add it. * emacs/guix-backend.el (guix-after-repl-operation-hook): Add 'guix-emacs-load-autoloads-maybe'. * emacs/guix-init.el.in: Autoload emacs packages. (guix-package-enable-at-startup): New variable.