chore(audit): triage webapp/tui/voxtype install-remove pairs

Pillar 3 Phase B, batch 3 — Batch A of the unused? clusters.

Deleted two dead webapp URI handlers:
- `nomarchy-webapp-handler-hey`
- `nomarchy-webapp-handler-zoom`

Neither was registered as a MimeType handler anywhere — a grep across
`*.desktop` files in `core/`, `features/`, `themes/`, `installer/`, and
`hosts/` returned zero matches. Without a `.desktop` registration the
system never routes `mailto:`/`zoom:`/`zoomus:` URIs to them, so the
handlers were unreachable code.

Kept the six remaining install/remove pairs (they're real CLI tools, just
unwired into any menu) and surfaced them in `SKILL.md` "Common Tasks" so
AI assistants can discover them on user request and the audit tags them
`kept`:
- Custom App Launchers: webapp-{install,remove,remove-all},
  tui-{install,remove,remove-all}
- Voice dictation: voxtype-{install,remove,status}

Menu-wiring these (e.g. a "Setup → Apps" submenu in nomarchy-menu) is a
separate Pillar 6 onboarding job, not scoped here.

Regenerated `docs/SCRIPTS.md` — script count 166 → 164, `unused?` 21 → 13.
Logged in `docs/ROADMAP.md` Shipped.

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

core/home/config/nomarchy-skill/SKILL.md

@@ -315,6 +315,29 @@ nomarchy-system-reboot           # Reboot
 
 **IMPORTANT:** Always run `nomarchy-debug` with `--no-sudo --print` flags to avoid interactive sudo prompts that will hang the terminal.
 
+### Custom App Launchers
+
+```bash
+nomarchy-webapp-install                  # Add a web app launcher (interactive)
+nomarchy-webapp-remove [name...]         # Remove web apps (interactive if no name)
+nomarchy-webapp-remove-all               # Bulk-remove every web app
+nomarchy-tui-install                     # Add a TUI launcher for a terminal program
+nomarchy-tui-remove [name...]            # Remove TUI launchers
+nomarchy-tui-remove-all                  # Bulk-remove every TUI launcher
+```
+
+Both families write `.desktop` files into `~/.local/share/applications/` so they appear in the app launcher (walker / rofi).
+
+### Voice dictation (Voxtype)
+
+```bash
+nomarchy-voxtype-install                 # Install Voxtype + AI model (~150MB)
+nomarchy-voxtype-remove                  # Uninstall Voxtype
+nomarchy-voxtype-status                  # Running state (also shown in waybar)
+```
+
+Toggle dictation with `SUPER+CTRL+X` after install.
+
 ## Troubleshooting
 
 ```bash