feat: add experimental support to output plan-*-network CLI commands to a FileSystemWarehouse

[ethanholz]

Is your feature request related to a problem? Please describe.
This is related to work in Warehouse.

Describe the solution you'd like
What I would like to do is add a CLI flag to plan-*-network commands to output a FileSystemWarehouse from #1671 to hold the GufeTokenizables. This would require an additional flag and a new function instead of a Warehouse.

Describe alternatives you've considered

n/a

Additional context

This work is already mostly done but I am creating this issue to track the PR once #1671 is closed.

[ethanholz]

Work for this task is being done on https://github.com/ethanholz/openfe/tree/feat/setup-cli

[atravitz]

@ethanholz can you confirm that this issue will be resolved by #1833?

[ethanholz]

@atravitz that is correct!