* Add OpenAI integration * Remove empty manifest fields * More prompt tweaks * Update manifest * Update homeassistant/components/openai_conversation/config_flow.py Co-authored-by: Franck Nijhof <git@frenck.dev> * Address comments * Add full integration tests * Cripple the integration * Test single instance Co-authored-by: Franck Nijhof <git@frenck.dev>