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/init.el

@@ -0,0 +1,48 @@
+(message "Welcome to Emacs")
+(message "Loading user configuration...")
+(message "Emacs profile: %s" fscotto/emacs-profile)
+
+;;=====================================================================================
+;; Load modules
+;;=====================================================================================
+(fscotto/load-modules
+ ;; Core
+ 'core/packages
+ 'core/ui
+ 'core/performance
+ 'core/editor
+ 'core/keybindings
+ 'core/buffer
+
+ ;; Tools
+ 'tools/completion
+ 'tools/project
+ 'tools/lsp
+ 'tools/dap
+ 'tools/treesitter
+
+ ;; Languages
+ 'lang/c
+ 'lang/docker
+ 'lang/golang
+ 'lang/json
+ 'lang/markdown
+ 'lang/org
+ 'lang/shell
+ 'lang/yaml
+
+ ;; Misc
+ 'misc/dashboard
+ 'misc/custom-functions
+ 'misc/doom-modeline
+ 'misc/which-key
+ 'misc/email
+ 'misc/rss
+ 'misc/terminal
+ 'misc/vcs
+ ;; FIXME PDF viewer with annotations
+ ;; 'misc/pdf
+ 'misc/epub
+ 'misc/i3-config)
+
+(message "...user configuration loaded")