3.0.0 Weather Entity Support & Entity Caching

Highlights:

• Weather Entity Support:
  You can now use any Home Assistant weather entity as the data source for the meteogram.
  Set entity_id in your card config. See README.md for details and limitations.
• Entity Caching:
  Forecasts from weather entities are cached in localStorage keyed by entity ID. Multiple entities can be cached and retrieved independently.
• Met.no API remains supported:
  If no entity_id is specified, the card uses the Met.no API as before.
• Focus Mode:
  New focussed option for a minimal chart display. When enabled, the card hides the title and attribution, showing only the chart—ideal for dashboards and kiosk views.
• Improved error handling and diagnostics.
• No more fillContainer option:
  The card now automatically sizes to its container.

Additional Changes:

• Chart Sizing & Margin Fixes:
  The chart now fills the card correctly in all configurations, especially when pressure is not shown. Previous issues with excessive gaps or margins have been resolved.
• Responsive Rendering:
  Improved logic for chart width and margins ensures the meteogram adapts smoothly to all container sizes and modes.
• Bug Fixes:
  • Fixed chart layout issues when pressure is not displayed.
  • Improved handling of edge cases for chart rendering and data availability.
• Codebase Improvements:
  • Refactored margin and sizing logic for clarity and maintainability.
  • Enhanced error reporting and diagnostics for easier troubleshooting.
• Theme & Style Support:
  • Continued support for CSS variables and dark mode.
  • Improved handling of custom properties for better compatibility with Home Assistant themes.
• Documentation Updates:
  • README and STYLES.md updated to reflect new features, options, and usage examples.