Bluetooth support as audio output

[Utopiah]

Due to necessity https://github.com/cardonabits/haxo-hw/issues/61 but also having good headphones while wanting to stay mobile I'd like to know how to use Bluetooth headphones.

[jcard0na]

If anyone is interested in implementing this, keep in mind that Bluetooth is disabled on the default images we've released so far. To re-enable it, you will need to remove or comment out this line from /boot/config.txt

dtoverlay=disable-bt

[Utopiah]

See also https://github.com/cardonabits/haxo-rs/issues/3