Fix Audio Playback Issues

Fixes #16

Update `play_audio` function to maintain original channel configuration.

* Change `play_audio` function in `nova.py` to read the audio file with `always_2d=False`.
* Update `play_tts` function to use the updated `play_audio` function.

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For more details, open the [Copilot Workspace session](https://copilot-workspace.githubnext.com/S0L0GUY/NOVA-AI/issues/16?shareId=XXXX-XXXX-XXXX-XXXX).

nova.py

@@ -52,7 +52,7 @@ def play_tts(text, output_device_index=constant.AUDIO_OUTPUT_INDEX):
         engine.runAndWait()
 
         def play_audio(file_path, output_device_index):
-            data, samplerate = sf.read(file_path, always_2d=True)
+            data, samplerate = sf.read(file_path, always_2d=False)
             sd.play(data, samplerate, device=output_device_index)
             sd.wait()