Add support for PyAudioWPatch audio input on Windows

- Updated README.md to include installation instructions for PyAudioWPatch.
- Modified setup.py to add PyAudioWPatch as an optional dependency.
- Enhanced audio_processor.py to initialize and handle PyAudioWPatch for system audio capture.
- Updated basic_server.py to manage audio input modes and integrate PyAudioWPatch processing.
- Refactored core.py to include audio input argument parsing.

setup.py

@@ -25,6 +25,7 @@ setup(
         "whisper-timestamped": ["whisper-timestamped"],
         "mlx-whisper": ["mlx-whisper"],
         "openai": ["openai"],
+        "pyaudiowpatch": ["PyAudioWPatch"],
     },
     package_data={
         'whisperlivekit': ['web/*.html'],