feat: initial commit — VoiceCoach real-time voice coaching pipeline

Services: Pipecat agent (LiveKit + Claude + Whisper STT + Piper TTS),
SpeechBrain analysis service, Piper TTS service, web client (nginx).
Includes LiveKit server config and docker-compose orchestration.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.gitignore

@@ -0,0 +1,51 @@
+# Environment secrets - never commit
+.env
+
+# Python
+__pycache__/
+*.py[cod]
+*.pyo
+*.pyd
+.Python
+*.egg-info/
+dist/
+build/
+*.egg
+.eggs/
+*.whl
+
+# Virtual environments
+venv/
+.venv/
+env/
+ENV/
+
+# Model weights and large binaries
+*.pt
+*.pth
+*.onnx
+*.bin
+*.safetensors
+models/
+
+# Piper voice models
+*.onnx.json
+
+# Logs
+*.log
+logs/
+
+# Docker
+.docker/
+
+# IDE
+.idea/
+.vscode/
+*.swp
+*.swo
+.DS_Store
+
+# Test artifacts
+.pytest_cache/
+.coverage
+htmlcov/