HASS.Agent implementation

[BeardedTinker]

Finally implementing HASS.agent in my system and here will be all of the code that is used.

So far 3 PCs are included:

• Zita and Luka notebooks with their own issues due to user rights
• Recording/my desktop PC

Most of the things are configured via HASS Satelite and Agent configuration, but as some sensors are multi-attribute, templates may be needed.

WOL was added to wake-up PC. For notebooks due to WiFi/motherboard limitation WOL is not available.
Disk capacity YAML code is used to pull data from sensor attributes.

[BeardedTinker]

There will be soon update on my system of this. Waiting for some confirmations first.