FIx microphone case for realtime ASR client (#151)

* Realtime ASR micropphone fix

* Set default server to localhost for realtime ASR client

* refactor argument parsing in realtime ASR client to use mutually exclusive input options and update default server port to 9000

* refactor logging in RealtimeClient to use debug level for detailed internal state and error messages

* Enhance RealtimeClient to support microphone input with PCM16 encoding and improve audio chunk handling with async iteration. Update logging for word information formatting and handle timeouts during audio processing.