Add Emacs config with install scripts for laptop and work

Shared: init.el / early-init.el with Vertico stack, Corfu, Eglot,
treesit-auto, Catppuccin Mocha, doom-modeline, Magit, avy, harpoon,
embark, wgrep, expand-region, envrc, org-mode, and drop-in lang loader.

Lang configs split by stow target:
- shared: elisp, org
- laptop: C/C++, Rust, Go, LaTeX (AUCTeX + latexmk + Zathura)
- work:   C#, JS/TS/HTML/CSS/React (apheleia+prettier), Copilot

install-personal.sh: Fedora — gcc/clang, rustup, Go, texlive, zathura
install-work.sh: Ubuntu 24.04 WSL — dotnet-sdk-10.0, Node 22 via nvm, ts-ls

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

shared/.config/emacs/lisp/langs/elisp.el

@@ -0,0 +1,7 @@
+;;; lisp/langs/elisp.el --- Emacs Lisp  -*- lexical-binding: t -*-
+
+;; Inline macro expansion — C-c e to expand, q to collapse
+(use-package macrostep
+  :bind (:map emacs-lisp-mode-map ("C-c e" . macrostep-expand)))
+
+(add-hook 'emacs-lisp-mode-hook #'flymake-mode)

shared/.config/emacs/lisp/langs/org.el

@@ -0,0 +1,26 @@
+;;; lisp/langs/org.el --- Org mode  -*- lexical-binding: t -*-
+
+(use-package org
+  :ensure nil
+  :custom
+  (org-directory             "~/org")
+  (org-startup-indented      t)
+  (org-startup-folded        'content)
+  (org-hide-emphasis-markers t)
+  (org-pretty-entities       t)
+  (org-return-follows-link   t)
+  (org-todo-keywords
+   '((sequence "TODO(t)" "NEXT(n)" "WAITING(w)" "|" "DONE(d)" "CANCELLED(c)")))
+  :bind (("C-c a" . org-agenda)
+         ("C-c c" . org-capture)
+         ("C-c l" . org-store-link)))
+
+;; Modern, clean visual style for org buffers and agenda
+(use-package org-modern
+  :hook ((org-mode             . org-modern-mode)
+         (org-agenda-finalize  . org-modern-agenda)))
+
+;; Reveal emphasis markers and links when cursor is on them
+(use-package org-appear
+  :hook (org-mode . org-appear-mode)
+  :custom (org-appear-autolinks t))