Add Config File Support for Existing Parameters

[adhilto]

💡 Summary

Add the capability to specify the existing ScubaGoggles parameters via a config file.

Motivation and context

See #161.

Implementation notes

See https://github.com/cisagov/ScubaGear/tree/main/PowerShell/ScubaGear/Sample-Config-Files

Acceptance criteria

• Existing parameters can be input via config file
• Plan for what happens when a parameter is supplied via both the command line and config file