fix(theme): hot-reload btop and opencode on theme switch

Phase B verdict on two unused? scripts — both inline comments
claimed they were "used by the Nomarchy theme switching", but the
switcher (themes/engine/scripts/nomarchy-theme-set) only restarted
walker, waybar, and the wallpaper service. So btop and opencode
stayed on the old palette after `nomarchy-theme-set <foo>` until
the user closed and reopened them by hand.

Wires both into nomarchy-theme-set, alongside the existing walker /
waybar restart calls. The check-then-call (`command -v ... &&`)
matches the surrounding style — a missing helper is a no-op, not a
fatal.

SCRIPTS.md regenerated: unused? 36 → 34, kept 163 → 165.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

docs/SCRIPTS.md

@@ -90,8 +90,8 @@ Phase B (per-batch PRs) refines those into `port-from-omarchy`,
 | `nomarchy-refresh-fastfetch` | `features/scripts/utils` | — | `unused?` |  |
 | `nomarchy-restart-app` | `features/scripts/utils` | core/system/scripts/nomarchy-restart-xcompose,features/desktop/scripts/nomarchy-restart-hypridle, +3 more | `kept` |  |
 | `nomarchy-restart-bluetooth` | `core/system/scripts` | features/scripts/utils/nomarchy-menu | `kept` |  |
-| `nomarchy-restart-btop` | `features/scripts/utils` | — | `unused?` |  |
-| `nomarchy-restart-opencode` | `features/scripts/utils` | — | `unused?` |  |
+| `nomarchy-restart-btop` | `features/scripts/utils` | themes/engine/scripts/nomarchy-theme-set | `kept` |  |
+| `nomarchy-restart-opencode` | `features/scripts/utils` | themes/engine/scripts/nomarchy-theme-set | `kept` |  |
 | `nomarchy-restart-pipewire` | `core/system/scripts` | features/scripts/utils/nomarchy-menu | `kept` |  |
 | `nomarchy-restart-terminal` | `features/scripts/utils` | core/home/config/nomarchy-skill/SKILL.md | `kept` |  |
 | `nomarchy-restart-tmux` | `features/scripts/utils` | — | `unused?` |  |