v0.1.2 — HACS catalog submission

Prepares OpenAI Codex Conversation for submission to the HACS default catalog.

• Adds HACS validation with no ignored checks and Home Assistant's Hassfest.
• Runs all 27 regression tests, Ruff lint, and formatting checks in GitHub Actions.
• Adds the repository metadata required by HACS.

The conversation behavior, device-code sign-in, and saved account configuration remain unchanged from v0.1.1. Requires Home Assistant 2026.9.0 or newer and a ChatGPT account with Codex access.

This release is published after the required validation run succeeds:
https://github.com/javaDevJT/home-assistant-openai-codex/actions/runs/34758408402

The default-catalog submission requires review by HACS maintainers. Until accepted, install using HACS Custom repositories, category Integration, or use the attached manual-installation ZIP.