feat: Add Issue #409 - Voice command interpreter
Implement lightweight voice command system with:
- Simple keyword + fuzzy matching parser for 7 basic commands
- Voice command node subscribing to /saltybot/speech_text
- VoiceCommand message publishing to /saltybot/voice_command
- Command router executing intents with TTS confirmation via Piper
- Support for: follow me, stop, come here, go home, battery, spin, quiet mode
- Configuration parameters for confidence thresholding
- Launch file for integrated voice command pipeline
- Unit tests for parser (keyword + fuzzy matching + normalization)
Co-Authored-By: Claude Haiku 4.5 <noreply@anthropic.com>
sl-perception
250c71d930