feat(deploy): enhance deployment scripts with skip options for backend and frontend

- Updated `deploy-yourpart-bluegreen.sh` to pass additional arguments for skipping backend or frontend updates.
- Enhanced `update.sh` to handle `--skip-backend` and `--skip-frontend` flags, allowing for more flexible deployment based on changes detected.
- Modified deployment workflow to conditionally execute based on changes in frontend or backend files, improving deployment efficiency.

deploy-yourpart-bluegreen.sh

@@ -11,6 +11,7 @@ set -euo pipefail
 
 CURRENT_LINK="${CURRENT_LINK:-/opt/yourpart}"
 TARGET="${1:?Ziel-Slot-Verzeichnis fehlt (z. B. /opt/yourpart-green)}"
+shift || true
 
 if [ ! -L "$CURRENT_LINK" ]; then
   echo "❌ ERROR: $CURRENT_LINK ist kein Symlink! (Blue-Green erfordert Symlink auf den aktiven Slot.)" >&2
@@ -20,4 +21,4 @@ fi
 SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 cd "$SCRIPT_DIR"
 
-exec ./update.sh "$TARGET"
+exec ./update.sh "$TARGET" "$@"