Add consistent --help/-h argument handling to update-doomemacs.sh,
rotate-wallpaper.sh, and upgrade.sh scripts. Each script now displays
usage information and a description of what it does.
update-claude-code already had --help support.
- Add home/wallpapers/default.nix with per-wallpaper scaling options
- Add 5 new Metroid-themed wallpapers to the rotation
- Update i3+sway and plasma-manager to use wallpaper module
- Add scripts/rotate-wallpaper.sh to cycle through wallpapers
- Add scripts/upgrade.sh to chain: flake update, doom, claude-code, wallpaper
- Add flake apps: rotate-wallpaper, update-claude-code, upgrade
- Fix claude-code update.sh to use REPO_ROOT for flake app compatibility
Run `nix run .#upgrade` for full system update with wallpaper rotation.
