Update ESPHome protocol implementation to match official linux-voice-assistant

Fix pyproject.toml to match Reachy Mini app requirements

Add wake word models and sound files

Fix README metadata: add sdk_version and app_file

Update repository URLs to Hugging Face

Restructure app for Reachy Mini App Assistant

Add Hugging Face Spaces metadata to README

Initial commit: Reachy Mini Home Assistant Voice Assistant

initial commit