Welcome to BigFix @britany.cool. If you haven’t already, I’d recommend reviewing the Getting Started guide on the BigFix developer portal.
Within Action Script there are a number of built-in operators. For example, you’d utilize regset or regset64 to create/set registry values on a targeted endpoint.
To move a file, there’s the move operator. There’s no folder move operator, so I’d recommend utilizing the waithidden operator and a XCOPY command (or similar).
For an example of executing a PowerShell script, please see @JasonWalker response on the Running PowerShell Script through BigFix forum post.
If the developer links aren’t useful, I’d recommend visiting the TA YouTube channel and consuming some of the available 5-minute videos on various BigFix topics.
I hope the above is helpful.