Potentially support formatting Powershell

[belav]

It is possible to parse powershell with .net, how feasible would it be to start supporting it with csharpier?

https://fuqua.io/blog/2017/12/parsing-powershell-programatically/

If this was added, should it be opt in? If more languages are supported, maybe csharpier needs to be told more specifically what files to include.

[belav]

Possible styleguide to follow - https://poshcode.gitbook.io/powershell-practice-and-style