Initial commit: audio-chat with fixes

- Created AGENTS.md with architecture documentation
- Fixed race conditions and async patterns
- Added conversation history to LLM prompts
- Fixed TTS audio shape handling
- Added buffer limits and graceful shutdown
- Fixed client.py with file sending support
- Removed duplicate requirements
- Added .gitignore

.gitignore

@@ -0,0 +1,12 @@
+__pycache__/
+*.pyc
+*.pyo
+.env
+.venv/
+venv/
+*.egg-info/
+dist/
+build/
+*.egg
+response_*.wav
+*.log