Add --skip-login option to QS Cloud create sheet icons command.

[mountaindude]

In corporate environment there may be SSO solutions that automatically log in users to QS Cloud using methods other than entering userid + password at the standard QS login page.

There are many identity providers out there and supporting them all is beyond the scope of Butler Sheet Icons.
It's however possible to support the scenario where no login is done when connecting to QS Cloud, as well as supporting select IdPs if needed.

This ticket covers the first scenario above, i.e. skipping the login page entirely.

Add an option --skip-login that assumes the user will land in the QS app without any prior manual interactions.