Group exposes

[andrei-lazarov]

Is your feature request related to a problem? Please describe.

I don't see a way of simply toggling a Zigbee group.
Normally you don't need it, because you would use a Home Assistant dashboard, or a remote. But:

• This confuses new users, when creating Zigbee groups
• Makes testing more difficult

Describe the solution you'd like
I would like each group to have an OFF/ON button on its page, like individual devices do.

Describe alternatives you've considered.
Another solution would be adding 3 dedicated buttons: OFF, TOGGLE, ON.
I like this a little better, because:

• it teaches users about the unpleasant 'toggle group' behavior.
  (TOGGLE actually toggles all targets / group members individually)
• it doesn't need to keep track of the group state?

Additional context
No rush to implement this, mainly wanted to get the idea out of my head 🙂

[Nerivec]

I've been going through Zigbee features one at a time, reporting, binding, scenes (pending), guess we can put groups next 😁 Lots of them require some tweaks on Z2M side too, takes quite a bit of time.

We'd need a more involved logic though, to determine the "purpose" of the group, features common to endpoints in it, that sort of things. I'll take a closer look once scenes are done 😉

[andrei-lazarov]

I also think Transition should be on the group settings page.
I'm thinking about lights. Not sure if it would apply to other devices types