feat(extras): add sync-cc service — Whisper/ffsubsync subtitle tool

Adds sync_cc as an extras service module:
- extras/sync_cc.py: the Python tool (3196 lines) — 8 modes: SYNC,
  GENERATE, BATCH, RENAME (TMDB), EXTRACT, REMUX, EMBED, BURNSUBS
- services/sync-cc.sh: installs system deps (python3, ffmpeg, mkvtoolnix,
  ccextractor), pip installs openai-whisper + ffsubsync, copies the script
  to ~/sync-cc/, prompts for TMDB API key → .env, creates /usr/local/bin/sync-cc
  wrapper so users run it from any directory containing video/SRT files

Heavy optional deps (easyocr, pgsreader) are installed on first use by the
script itself. GPU (CUDA/MPS) is used automatically if detected.

https://claude.ai/code/session_01Y4dMKtkqkpvmgDKoRdzhTG

setup.sh

@@ -81,6 +81,7 @@ is_installed() {
         crowdsec) command -v cscli >/dev/null 2>&1 ;;
         silent-send) [ -d "$ACTUAL_HOME/silent-send/.git" ] ;;
         linux-to-sync) [ -d "$ACTUAL_HOME/linux-to-sync/.git" ] ;;
+        sync-cc) [ -f "$ACTUAL_HOME/sync-cc/sync_cc.py" ] ;;
         *) [ -e "$DOCKER_DIR/$1" ] ;;
     esac
 }