add troubleshooting command to test for firewall issues

`aio login` requires the use of a localhost server by the cli so the browser can communicate with the cli. Sometimes a user's browser has ERR_CONNECTION_REFUSED and can't connect. If it can't connect automatically, we print out a link for the user to click on (this is for Safari which has this problem).

But users are encountering this on Windows, whether in wsl or not in wsl. Have a diagnostic command or troubleshooting information so we can provide a workaround.