feat: improve ID35 dashboard - clean entity names, add ID35 in title ...

- Dashboard title: 'Biuro / Garderoba (ID35)'
- DO outputs show: 'Oświetlenie BW1/BW2/G1/G2 (led)' (without device prefix)
- Device name updated to 'Biuro/Garderoba - ID35'

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

fix: remove duplicate device name prefix in entity names ...

- get_entity_name now returns just readable name (without device_name prefix)
  since HA auto-prepends device name to entity name in MQTT discovery
- Update id35_dashboard.yaml: remove hardcoded names (DO.0/1/2/3) to use
  friendly names from ibsystem2mqtt; update DI sensors to use new entity IDs

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>