Added topic for default device volume

The audio commands addon will send the default device volume on the /audio/volume topic. The default device is the one currently selected on your laptop. So if you play music on your headphones, then you will get the volume of your headphones. If you unplug them, then you will receive the volume of your PC.

This release also includes support for AMD CPU temperature.

Audio Commands addon

Created audio commands addon

CPU temperature sensor

Implemented reading the CPU temperature and sending it through MQTT. The temperature will actually be an average of all the cores.