fix: Remove pyaudio from required dependencies to fix CI

- Made pyaudio truly optional in hanzo-repl voice extras
- Pyaudio requires portaudio system library which is not available in CI
- Users can manually install pyaudio if they need voice features

pkg/hanzo-repl/pyproject.toml

@@ -48,9 +48,10 @@ Issues = "https://github.com/hanzoai/python-sdk/issues"
 voice = [
     "speechrecognition>=3.10.0",
     "pyttsx3>=2.90",
-    "pyaudio>=0.2.11",
     "sounddevice>=0.4.6",
     "numpy>=1.24.0",
+    # pyaudio is optional and requires system dependencies
+    # Install with: pip install pyaudio (requires portaudio system library)
 ]
 dev = [
     "pytest>=7.0.0",