style(config): Reformat Emacs Lisp code for consistency

Standardize formatting across multiple init files: expand
single-line use-package keywords onto separate lines, fix
indentation, remove outdated comments, and clean up whitespace. Also
adds mc/keymap <return> binding and improves fcitx5 startup logic in
EXWM.

lisp/init-dired.el

@@ -28,7 +28,7 @@
   (setq dirvish-default-layout '(1 0.15 0.45))
 
   (with-eval-after-load 'dirvish
-  (add-hook 'dired-mode-hook #'dired-hide-details-mode))
+    (add-hook 'dired-mode-hook #'dired-hide-details-mode))
 
   :custom
   (dirvish-quick-access-entries
@@ -62,7 +62,8 @@
     (t nil))))
 
 (use-package trashed
-  :commands (trashed)
+  :commands
+  (trashed)
   :config
   (setq trashed-action-confirmer 'y-or-n-p)
   (setq trashed-use-header-line t)