Integration for GLInet Routers

I wrote a new integration which almost all the integrations I write are MQTT discovery and docker containers.

Right now, it gets battery % and temperature of the GLINET device. I’ve only tested the XE-3000. It could get lots of other things - so maybe I will add more sensors later.

GLINET routers are used commonly for mobile or off-grid situations like RVs, camper vans or farm sites. They have LION batteries in them. So, the initial release to get the battery charge % is meant to be used as an indicator of a power issue at the off-grid site. E.g: battery falls below 100%.

Thanks