Create Binary sensor running.
Good morning and thanks for the great work, this works great.

All official ha add-ons incorporate a binary sensor that indicates when the add-on is running.

![image](https://github.com/user-attachments/assets/2480d494-437a-4de7-a7ca-791dc69f9424)



I have created a button to turn on and off the add-on to be able to access via Babywave to my control panel. We already know that the serial port only allows one connection.

Well, when I went to read the running sensor to link it to the switch on and off of my button so that it is always coordinated even if I switch it off from the add-on panel and not from the button itself. I found that this add-on does not have this sensor.

I would like to help and be able to create it myself, but I have no idea about programming, this is the closest I can get. 

So I would ask if you could consider my request.

Thank you very much for your work, please keep it up.