MultipeerServiceBrowser
Discovers peers that are advertising over Apple's MultipeerConnectivity framework on the same Wi-Fi network or Bluetooth PAN.
The browser is paired with a MultipeerPeerLinkFactory: the factory owns the MCNearbyServiceBrowser and the live MCPeerID map, and the browser exposes a transport-agnostic Flow<Tag> for the consumer.
Implementations live in appleMain; jvmMain wraps the dylib + JNA bridge.