enhancement: auth ollama connection

[Haunui]

Is your feature request related to a problem? Please describe.
I'm hosting my Ollama on OVH Public Cloud. My application is private so I need to use token authentication to access it. But, unfortunately, I didn't find the possibility to pass token in open-webui connections settings.

Describe the solution you'd like
Allow user to pass token per Ollama Base URL.

Additional context
The feature is already done and it look like this :

The token field is hide by default.

You can show it by clicking on the key :