otMdnsRegisterCallback
Represents the callback function to report the outcome of a host, service, or key registration request. The outcome of a registration request is reported back by invoking this callback with one of the following `aError` inputs: - `OT_ERROR_NONE` indicates registration was successful. - `OT_ERROR_DUPLICATED` indicates a name conflict while probing, i.e., name is claimed by another mDNS responder. See `otMdnsRegisterHost()`, `otMdnsRegisterService()`, and `otMdnsRegisterKey()` for more details about when the callback will be invoked.