Missing proxy configuration support (Axios / Corporate environments)

[francescobianco]

🌐 Missing proxy configuration support

Labels: feature, network
Library context: Axios (proxy usage in Node.js)

Description:
In corporate or enterprise environments using axios, outbound HTTP calls must go through a proxy.
The current Openapi SDK does not allow passing proxy settings, neither via process.env.HTTP_PROXY nor via client configuration.

Expected behavior:
Support axios-style proxy configuration, for example:

Openapi.configure({
  proxy: {
    host: "proxy.company.local",
    port: 8080,
  },
});