Walking Time, System Health & New Translations

✨ New Features

• Walking Time Offset: You can now configure a walking time offset for the departure board. This allows you to see departures based on when you need to leave to catch them.
• System Health: The integration now provides system health information, checking if the Golemio API endpoint is reachable.

🌍 Translations
Added German and Slovak translations.

🔧 Improvements & Fixes

• Updated the internal list of public transport stops.
• Refactored the translation method to resolve a deprecation notice in Home Assistant 2025.8.