Add OpenAI model to configuration

What's Changed

• [feat/add-models-to-env] Define OpenAi Model in .env by @nboguckiMacopedia in #12
• merge develop to main by @nboguckiMacopedia in #13

New Contributors

• @nboguckiMacopedia made their first contribution in #12

Full Changelog: v1.2.3...v1.2.4