LibreOffice Calc extension for Silo PLM integration. Uses shared
silo-client package (submodule) for API communication.
Changes from monorepo version:
- SiloClient class removed from client.py, replaced with CalcSiloSettings
adapter + factory function wrapping silo_client.SiloClient
- silo_calc_component.py adds silo-client to sys.path
- Makefile build-oxt copies silo_client into .oxt for self-contained packaging
- All other modules unchanged