gaming: add kyber-server service (headless SWBF2 dedicated server via Docker)

- Auto-detects SWBF2 install path; loud error with install instructions if missing
- Downloads Kyber AppImage if not present, extracts kyber_cli, runs get_token
  (opens browser for EA OAuth — one-time step, token never expires)
- Prompts for EA credentials (written to .env, chmod 600) and server name
- Auto-detects GPU (NVIDIA/Intel/AMD) and adds appropriate passthrough config
- Writes docker-compose.yml + .env to ~/docker/kyber-server/
- Map rotation left blank by default with instructions in .env comments

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01D8ckUJQtj1pH8jtAddBDZs

README.md

@@ -70,7 +70,7 @@ Update them any time with `sudo ./setup.sh configure`.
 | `utilities` | `actualbudget`, `ai-gpu`, `archivebox`, `changedetection`, `ddclient`, `filebrowser`, `fmd`, `gatus`, `homebox`, `iopaint`, `joplin`, `koha`, `magicmirror`, `mail-archiver`, `mattermost`, `mealie`, `meshcentral`, `n8n`, `nextcloud`, `ntfy`, `onlyoffice`, `portainer`, `rustdesk`, `stirling-pdf`, `syncthing`, `traccar`, `unifi`, `uptimekuma`, `vaultwarden`, `watchyourlan`, `watchtower`, `wg-easy` |
 | `media` | `arm`, `audiobookshelf`, `calibre-web`, `emby`, `immich`, `jellyfin`, `lyrion` |
 | `cameras` | `frigate`, `frigate-audio`, `frigate-notify`, `sky-cam` |
-| `gaming` | `drum-rhythm-game`, `js99er`, `minecraft`, `wolf`, `wolf-pair` |
+| `gaming` | `drum-rhythm-game`, `js99er`, `kyber-server`, `minecraft`, `wolf`, `wolf-pair` |
 | `extras` | `kdeconnect`, `silent-send`, `sync-cc` |
 | `backup` | `backup` — complete recovery: entire `~/docker/<service>/` for every service via Kopia (Minecraft: flush+snap, no downtime; others: stop/snap/start for DB consistency); `borg-backup` — same coverage via Borg (chunk dedup, SSH remote repos, Borgmatic/Vorta compatible); `gaming-backup` — frequent game-save snapshots (Minecraft world data, emulator saves, Steam — no downtime, run hourly) |