feat: add Cleanflix Connector Tauri desktop app

Move the Mac Tauri UI (pro.cleanflix.connector) into this repo under desktop/. Bundled Node runtime stays gitignored; package scripts fetch it when building.

desktop/sidecar/distribution-common/start-connector.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env sh
+set -eu
+
+CONFIG_PATH=${CLEANFLIX_CONFIG_PATH:?CLEANFLIX_CONFIG_PATH is required}
+APP_ROOT=${CLEANFLIX_APP_ROOT:?CLEANFLIX_APP_ROOT is required}
+[ -f "$CONFIG_PATH" ] || { printf '%s\n' "Missing configuration: $CONFIG_PATH" >&2; exit 1; }
+
+set -a
+. "$CONFIG_PATH"
+set +a
+
+: "${MEDIA_ROOT:?Set MEDIA_ROOT in config.env}"
+: "${PAIRING_PASSWORD_HASH:?Set PAIRING_PASSWORD_HASH in config.env}"
+: "${PUBLIC_BASE_URL:?Set PUBLIC_BASE_URL in config.env}"
+
+export TOKEN_STORE_PATH="${TOKEN_STORE_PATH:-$(dirname "$CONFIG_PATH")/data/tokens.json}"
+export LIBRARY_INDEX_PATH="${LIBRARY_INDEX_PATH:-$(dirname "$CONFIG_PATH")/data/library-index.json}"
+exec "$CLEANFLIX_NODE" "$APP_ROOT/server.js"