ESPHome Dashboard should indicate possible updates with color again

The dashboard use to show with a color whether a device firmware could be updated. This was super useful, particularly if one has a large number of devices.

This feature was removed in one of the last updates and, since then, the dashboard only shows "Update" in text form.

I'd like to request to show available updates in color again to increase usability and user experience.

Start at the ESPHome Dashboard and inspect how devices with available firmware updates are currently presented. Compare the current text-only “Update” indicator with the requested color indication, and treat restoring a clear color cue while retaining the text as done.

Written by the indexing model from the issue text.