Add support for connecting to Connect server

[joshuadavidthomas]

I don't use it*, but I imagine this would be a pretty reasonable expectation that this library would be able to use a Connect server instead of a service account.

On the plus side, looks like a relatively easy change -- just a different set of environment variables to use. https://developer.1password.com/docs/connect/connect-cli/

*Don't use it at the moment, but I have been curious to try it out when I get some time.