Request support for customizing the OpenAI Base-API URL address.

[seifer08ms]

Currently, the plugin may be limited by its use of a predefined OpenAI API endpoint. However, the ability to set a custom OpenAI API URL would accommodate various user needs, including compliance with specific API access requirements or integration with self-hosted solutions. Thank you for considering this enhancement. I believe it would make the plugin even more versatile and valuable to its user base.