Add: Ability to pick a local image asset as a dashboard background image via UI

[marcinbauer85]

Description

This design addresses a proposal to pick a local image asset with the use of the current UI.

Note

Detailed notes and previews can be found in the Figma file.

Design & Notes

https://www.figma.com/design/AKeKccgRBaCy871REB5V9c/HA-04?node-id=0-1&node-type=canvas&t=Q6YNkSdDAmRBCRNL-11

Tip

To preview Figma files directly in Github please consider installing Figink Chrome extension

- Home Assistant (Nabu Casa) Product Team