[Feature]: Show current humidity level in humidifier card

[ADeeds]

Requirements

• [X] I have updated Mushroom to the latest available version
• [X] I did a search to see if there is a similar issue or if a pull request is open.

Is your feature request related to a problem?

I currently use my dehumidifier with the Mushroom humidifier card. I really like it, but it would be helpful to be able to display the current humidity level (which my dehumidifer measures) inside of the card.

Describe the solution you'd like

I'm not sure what's best implementation from a dev perspective, from a user perspective it would be cool if I could provide an arbitrary sensor for primary/secondary information type.

Describe alternatives you've considered

AFAICT templating doesn't work in fields like the card name, otherwise I would do something like set the name to Dehumidifier ({{ states(blahblahblah)}}%.

I can get that to work in the template card but I don't think there's a way to add a slider to control the humidity level there. Maybe that would be a more powerful way to make this feature request possible? It would also help people who want to do a bit more customization for thermostats or lights.

Additional context

No response