Add Emacs desktop provisioning and dev toolchain packages

Install Emacs and copy the desktop .emacs.d config so the editor setup is managed with the rest of desktop dotfiles. Add vterm/build/debug dependencies plus C/C++ and Go tooling needed by the configured workflow.

dotfiles/desktop/.emacs.d/lisp/lang/docker.el

@@ -0,0 +1,8 @@
+;;; docker.el -*- lexical-binding: t; -*-
+
+(use-package dockerfile-mode
+  :ensure t)
+
+(provide 'docker)
+
+;;; docker.el ends here