Support multiple bluetooth adapters #86
Description
Currently, libwebauthn enumerates Bluetooth adapters on the system and picks the first available to perform all BLE operations.
On some systems, multiple adapters may be available. We may want to allow either using them all at once, or somehow make this user configurable. I'd be curious to understand what other implementations do in this case.
We would also need to figure out how to resolve the duplication issue of discovering the same peripherals with multiple adapters - do we list the same device twice, or deduplicate into one device? If the latter, which adapter do we prefer?