v2025.09.1 - Move away from base64-encoded background

What's Changed

• Move away from base64-encoded background by @JOHLC in #40
  Home Assistant now supports .webp background images, and the base64 string for the background was so incredibly long that it was likely causing performance issues and making debugging in dev tools more difficult.

The background image of this theme has been moved to a hosted .webp image.
You can still customize your background by following the provided instructions.

Full Changelog:
Compare v2025.09.1-beta2…v2025.09.1