client: Add ranging distance display support to bluetoothctl

Track org.bluez.Ranging1 proxies and append/remove them
on InterfacesAdded/InterfacesRemoved.

Print the Distance property on PropertiesChanged, and show it
under the info option alongside the Battery Percentage and the
newly added CS Session Active property.

Add register_provider and unregister_provider options as a
reference implementation. The estimate is derived only from Mode 1
and Mode 3 RTT samples; procedures without any such step report no
distance rather than a made up one.

The RangingProviderManager1 of the default controller is resolved
from a tracked proxy list, so it is picked up regardless of the
order the adapter and manager proxies arrive in and follows a later
"select".