Gateway support - basic steps

[MarkPaxton]

Hello,

I know that tinytuya has an option to list connected / associated devices for a gateway. As a first step for dealing with gateways in general (sub-device detection & connection pooling) I'd really like to try a few things.

Is it possible to set up the gateway as a device with a 'text' entity that can list out the detected devices using subdev_query?

https://github.com/jasonacox/tinytuya/blob/d17d031b858bfeba811fcb5b2d9a3213a196d12a/tinytuya/core.py#L1612

Possibly then we could add the gateway as a device and eventually add the subdevices off the back of it, or at use it for connection pooling?