Decoupled Predbat from AppDaemon

What's Changed

Decouped Predbat from AppDaemon

Predbat now communicates with Home Assistant directly if it can do but AppDeamon is still supported
You can set ha_url/ha_key in apps.yaml to define the connection to Home Assistant (for use as stand-alone e.g. MacOS/Linux or inside Docker) or it can pick it up from SUPERVISOR_KEY which is present in Home Assistant add-ons

Functionality should be unchanged but its possible there maybe new bugs

• Support for HA direct connection improved by @springfall2008 in #1132
• Websocket dev by @springfall2008 in #1133
• Decouple call_service from appDaemon by @springfall2008 in #1134
• Standalone Predbat development by @springfall2008 in #1138

Full Changelog: v7.19.7...v7.20.0