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/early-init.el

@@ -0,0 +1,23 @@
+;;=====================================================================================
+;; Define loader functions
+;;=====================================================================================
+(defconst fscotto/modules-dir
+  (expand-file-name "lisp" user-emacs-directory))
+
+(defun fscotto/load-module (module)
+  "Load a MODULE from symbol."
+  (let* ((module-name (symbol-name module))
+         (path (expand-file-name
+                (concat (replace-regexp-in-string "/" "/" module-name)
+                        ".el")
+                fscotto/modules-dir)))
+    (unless (file-exists-p path)
+      (error "Module not found: %s" path))
+    (load path nil 'nomessage)))
+
+(defun fscotto/load-modules (&rest modules)
+  "Load MODULES."
+  (mapc #'fscotto/load-module modules))
+
+(defvar fscotto/emacs-profile
+  (or (getenv "EMACS_PROFILE") "full"))