[Feature Request] Add NFC Bluetooth pairing support

[MagneFire]

Recently we added support for NFC (https://github.com/AsteroidOS/meta-asteroid/pull/120). It would be cool to have the ability to pair to your watch by simply "tapping" it.

bluez5 should have support for it by enabling it via the --enable-nfc compilation flag. The NFC package should support neard (https://git.kernel.org/pub/scm/network/nfc/neard.git, https://github.com/sailfishos/nfcd/blob/master/plugins/dbus_neard/README).

The challenge would be to emulate a tag on the watch or phone side. But as a first step we could try to write a Bluetooth configuration to a tag and try to pair using that.