Allow using BT and BLE devices from HA

This closes #484 by allowing the powering on of bluetooth inside the Home Assistant container and using the `hci` devices otherwise not accessible.
This was initiated to be able to use the Airthings Wave Plus device that uses BLE from an integration interacting with `bluetoothd` and the `/dev/hci` directly.

Author: Tzaphkiel

.templates/home_assistant/service.yml

@@ -8,4 +8,9 @@ home_assistant:
   volumes:
     - /etc/localtime:/etc/localtime:ro
     - ./volumes/home_assistant:/config
-
+    - /var/run/dbus/system_bus_socket:/var/run/dbus/system_bus_socket
+  devices:
+    - "/dev/ttyAMA0:/dev/ttyAMA0"
+    - "/dev/vcio:/dev/vcio"
+    - "/dev/gpiomem:/dev/gpiomem"
+  privileged: true