Config: Strip down and simplify Emacs config

- Remove consult-dir, nerd-icons-completion, org-contrib and some other unused package
- Delete init-org-refile.el and related keybindings
- Prune EMMS config
- Remove EXWM flatpak launcher helpers (vscodium, localsend, steam)
- Extract Windows dirvish video preview fix to standalone module
- Drop built-in settings moved elsewhere (startup defaults, whitespace, etc.)
- Clean up trailing whitespace / process list prettify configs

lisp/init-completion.el

@@ -24,7 +24,7 @@
 ;; corfu
 (use-package corfu
   :autoload (corfu-quit consult-completion-in-region)
-  :functions (persistent-scratch-save corfu-move-to-minibuffer)
+  :functions (persistent-scratch-save)
   :custom
   (corfu-auto t)
   (corfu-auto-prefix 2)
@@ -48,17 +48,6 @@
   (add-hook 'before-save-hook #'corfu-quit)
   (advice-add #'persistent-scratch-save :before #'corfu-quit)
 
-  ;; Move completions to minibuffer
-  (defun corfu-move-to-minibuffer ()
-    (interactive)
-    (pcase completion-in-region--data
-      (`(,beg ,end ,table ,pred ,extras)
-       (let ((completion-extra-properties extras)
-             completion-cycle-threshold completion-cycling)
-         (consult-completion-in-region beg end table pred)))))
-  (keymap-set corfu-map "M-m" #'corfu-move-to-minibuffer)
-  (add-to-list 'corfu-continue-commands #'corfu-move-to-minibuffer)
-
   :bind   (:map corfu-map
 	            ("RET" . nil)))
 
@@ -73,9 +62,6 @@
             (setq-local corfu-auto nil)
             (local-set-key (kbd "TAB") 'completion-at-point)))
 
-(use-package nerd-icons-completion
-  :hook (marginalia-mode . nerd-icons-completion-marginalia-setup))
-
 (use-package emacs
   :custom
   (tab-always-indent 'complete)