FEAT: Added support for Bearer token in header for protected endpoints

[Sinan-Karakaya]

I added the support of Bearer token in the header for protected endpoints of Ollama. Here is what I did:

• Added Bearer token settings property. If left empty, nothing special will happen
• If it is not empty, we assume that the endpoint is protected. Therefore, we include the Bearer token in the header for all requests to the endpoint.

[ex3ndr]

Nice!