v0.9.4: gaming modules (wolf, js99er), backup module, versioning

- services/wolf.sh (gaming): Games-on-Whales Wolf / Moonlight, per-service
  folder ~/docker/wolf, wolf-pair dropped, manage.sh pin workflow kept.
- services/js99er.sh (gaming): TI-99/4A emulator, own folder, port 8099,
  Selkies launcher tie-in removed.
- services/backup.sh: Kopia encrypted backups, paths adapted to ~/docker.
- Start versioning: VERSION (0.9.4), CHANGELOG.md, setup.sh --version flag.

All modules pass bash -n; ./setup.sh --list groups base/homelab/gaming/backup;
dry-run run-one exits 0 for every module with real commands guarded.

Note: minecraft module deferred to 0.9.5 (port hit a session limit).

https://claude.ai/code/session_017eA2qqq9jfF2tNtpUYL8vK

setup.sh

@@ -27,6 +27,7 @@ for arg in "$@"; do
         --dry-run)    DRY_RUN=true ;;
         --unattended) UNATTENDED=true ;;
         --list|-l)    DO_LIST=true ;;
+        --version|-V) cat "$HERE/VERSION" 2>/dev/null || echo "unknown"; exit 0 ;;
         -h|--help)
             sed -n '2,18p' "${BASH_SOURCE[0]}" | sed 's/^# \{0,1\}//'
             exit 0 ;;