Add support for showing the minimum and maximum values

[TheLastProject]

I quite like the bar card, but I'd like to display my weather on it with the current temperature and today's low and high.

I messed around a bit and I believe this is a rather clean way to make cases like this possible that, as far as I have tested, doesn't break anything.

Example:

I've been trying changes incrementally, so please squash these commits together if you do want to accept these changes :)

[Gluwc]

Hey this is a pretty cool idea, I'll try to integrate it tomorrow.

Noticed an issue with the alignment of the value when using the split option together with an icon.

Old

New

- type: custom:bar-card
  icon_position: inside
  align: split
  indicator: right
  entities:
    - sensor.lucas_phone_battery

[TheLastProject]

I think I fixed that regression. Can you please check if all behaviour is as you expect it to be now?