Allows entities to be enabled and disabled via automations and scripts

[alexsaas]

Similar to my FR on editing helper groups with automations, see here:

https://github.com/orgs/home-assistant/discussions/2169

It would be great if we could also activate and deactivate entities via automations and scripts, just as we can already do with automations themselves.

For example, you could automatically activate or deactivate Christmas lights using certain triggers.

BTW: Merry Christmas to everyone 🎄