Merge remote-tracking branch 'origin/main' into codex/s2s-realtime-backend

# Conflicts:
#	.env.example
#	README.md
#	src/reachy_mini_conversation_app/audio/head_wobbler.py
#	src/reachy_mini_conversation_app/config.py
#	src/reachy_mini_conversation_app/console.py
#	src/reachy_mini_conversation_app/gradio_personality.py
#	src/reachy_mini_conversation_app/headless_personality_ui.py
#	src/reachy_mini_conversation_app/main.py
#	src/reachy_mini_conversation_app/openai_realtime.py
#	src/reachy_mini_conversation_app/prompts.py
#	src/reachy_mini_conversation_app/static/index.html
#	src/reachy_mini_conversation_app/static/main.js
#	src/reachy_mini_conversation_app/tools/camera.py
#	src/reachy_mini_conversation_app/utils.py
#	src/reachy_mini_conversation_app/vision/head_tracking/yolo.py
#	tests/audio/test_head_wobbler.py
#	tests/test_openai_realtime.py