Add support for Ecovacs GOAT O1200 RTK in official Ecovacs integration

Hi,
I’d like to request support for the Ecovacs GOAT O1200 RTK in the official ecovacs: integration.

This robotic mower is part of the same series as the GOAT O500 and O800 RTK, which appear to use similar cloud APIs and app communication.

Thanks in advance!
Jakob