Split-PDF option to split every X pages

The current behavior (which works fine as a "default") is to split the PDF at every page break. I have a need of something that will split a PDF every *x* pages. Could look something like this:

```
Split-PDF -FilePath '.\PDFtoSplit.pdf' -OutputFolder $PathToOutput -pages 2
```
If no '-pages' variable is specified, then the command defaults to "1"