- Add ServiceDict and UpdateDict TypedDicts to models
- Add get_services() / manage_service() abstract methods for init-system interaction
- Add get_available_updates() / apply_updates() for package upgrade workflows
- Add _filter_interfaces() helper to exclude lo and phy* interfaces from interface dicts
- Extend WirelessClientDict with optional ip, hostname, and lease_end fields
- Add optional description field to VPNTunnelDict
- Bump version 0.1.0 → 0.2.0