Add a new filter option to show only models with available updates across all supported languages. This includes:
- Adding "updates" filter translations in all locale files (de, en, es, fr, he, ja, ko)
- Extending BaseModelApiClient to handle update_available_only query parameter
- Implementing update filter button in PageControls component with event listeners
- Adding corresponding CSS styles for active filter state
The feature allows users to quickly identify and focus on models that have updates available, improving the update management workflow.