Restore nymph hardware and power management config

Re-add NVIDIA/Intel GPU packages, tlp/power-profiles-daemon, and
emptty error logging to host_vars/nymph.yml — these were dropped
when the Arch path was removed but are independent of Arch and
needed for nymph laptop hardware. Drop two orphaned Wayland/Sway
residues: kanshi config and the historical Sway cleanup script.

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

scripts/cleanup_nymph_sway.sh

@@ -1,73 +0,0 @@
-#!/usr/bin/env sh
-
-set -eu
-
-PACKAGES="
-swayfx
-kanshi
-grim
-grimshot
-slurp
-wl-clipboard
-xdg-desktop-portal-wlr
-cliphist
-noctalia-shell
-"
-
-USER_PATHS="
-$HOME/.config/sway
-$HOME/.config/kanshi
-$HOME/.config/noctalia
-$HOME/.local/share/noctalia-plugins
-$HOME/.local/bin/start-sway-session
-"
-
-SYSTEM_FILES="
-/etc/emptty/wayland-sessions/Sway.desktop
-/etc/xbps.d/noctalia.conf
-"
-
-check_host() {
-  if [ "$(hostname)" != "nymph" ]; then
-    printf 'Error: questo script è destinato solo a nymph (hostname attuale: %s)\n' "$(hostname)" >&2
-    exit 1
-  fi
-}
-
-remove_packages() {
-  printf 'Rimozione pacchetti swayfx+noctalia...\n'
-  # shellcheck disable=SC2086
-  sudo xbps-remove -Ry $PACKAGES
-  printf 'Rimozione dipendenze orfane...\n'
-  sudo xbps-remove -o
-}
-
-remove_user_configs() {
-  printf 'Rimozione configurazioni utente...\n'
-  for path in $USER_PATHS; do
-    if [ -e "$path" ]; then
-      rm -rf "$path"
-      printf '  rimosso: %s\n' "$path"
-    fi
-  done
-}
-
-remove_system_files() {
-  printf 'Rimozione file di sistema...\n'
-  for file in $SYSTEM_FILES; do
-    if [ -e "$file" ]; then
-      sudo rm -f "$file"
-      printf '  rimosso: %s\n' "$file"
-    fi
-  done
-}
-
-main() {
-  check_host
-  remove_packages
-  remove_user_configs
-  remove_system_files
-  printf 'Cleanup completato.\n'
-}
-
-main "$@"