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

init.el

@@ -40,7 +40,6 @@
     (require 'init-startup)
     (require 'init-elpa)
     (require 'init-terminal-package)
-    (require 'init-prog)
     (require 'init-terminal-ui)
     (require 'init-terminal-kbd)
     (require 'init-segmentation)))