Support cookie-based authentication as an alternative to form login

[Douglasrs]

Is your feature request related to a problem?

Some of the sites I want to keep active use a captcha (or some other bot-check) on their login page, so Enterr automatic form-detection (and even a custom login script) can't get past it reliably.

Describe the solution you'd like

It would be great if Enterr could authenticate using cookies instead of, or as an alternative to, the username/password flow.

Pull Request

• I would like to do a Pull Request

Code of Conduct

• I agree to follow this project's Code of Conduct

[JonBunator]

Sure sounds good, thanks for the suggestion