Add Multi-Switch Device
**Is your feature request related to a problem? Please describe.**
I am currently using the plugin to expose 10 switches to the home app that set different volume levels on my audio receiver. These switches would work perfectly in a multi-switch or power strip device, but I can't find any plugins that provide this switch type & also poll the device for status. 

Right now, all 10 switches are polling the receiver, and I would like to have a multi-switch with a single status URL so it only needs to poll 1 time to get status of all 10, instead of polling 10 times to get status of each 1. 

I tried to use Switcheroo, but it doesn't have any status polling. There are other plugins I can use but none have this polling you have implemented. 

**Describe the solution you'd like**
Create a multi-swtich that has a single base url (host), a single status url, and a status pattern & url string for each switch. 

This would cut my API calls down by a factor of 10, and would allow me to poll more frequently to update the switch status more quickly. Right now I am using 30 seconds as my polling interval to not congest my network. 

**Additional context**
I love how well your plugin works, but this upgrade would be amazing & work even more perfectly for me. 

I would love to help in any way possible. I would love it if it worked just like a Switcheroo Multiswitch, only with status polling.

I REALLY appreciate your consideration!
