What is the relation between GH devices and "device type" in HS3.
It seems that that HS3 integration with GH supports two types of devices only

ON/OFF switch
Dimmer from 0 to 100%

Here are my questions

1. Did HS team add more device types lately or we are stuck with these 2 only? Any plans to add more?
2. What attribute of HS3 device is used to determine to which (of the above two) group a device belongs? Is it by HS3 "device type" or by "device control" or by "is dimmable" attribute or something else?
3. Is there a documentation about HS3 - GH integration and where is it?