client: provide access to info of OpenAPI

[fklebert]

As the OpenAPI generator now supports adding a base yaml with an OpenAPI info section, it would be awesome to get this also in the client code.

// Fetch the OpenAPI configuration using the HTTP client
    auto openApiConfig = fetchOpenAPIConfig(openApiUrl, *httpClient);

I would assume that the above call would give me access to it.

[josephbirkner]

I see, interesting idea. I guess it might make sense to just provide access to the full original OpenAPI YAML as it was loaded from the server. Then the API will be straightforward.