Add SharePoint File Upload

[bigbird023]

Want to be able to generate a report in R and publish to a sharepoint site

[bigbird023]

rough but working codebase

https://github.com/PennState/AzureGraph/tree/feature/UpDownload

[hongooi73]

This is now available in Microsoft365R, which should be heading to CRAN before too long.

[bigbird023]

awesome!

[hongooi73]

Microsoft365R is now on CRAN.