Implement rtCopy and rtMove calls

[thomas-bc]

Is your feature request related to a problem? Please describe.
It is frustrating that only rtDownload() and rtUpload() are implemented. Sometimes in CI, there are justifications for moving/copying files from one location to another.
Am I missing something there? Why aren't functionalities like rtCopy() and rtMove() implemented? They sound to me like very common things a developer would use...

Describe the solution you'd like to see
Implement copy/move API calls in rtCopy() and rtMove()

Describe alternatives you've considered
rtDownload() and then rtUpload() to mimick a copy/move, but this is highly inefficient. Otherwise, use the CLI directly, but this exposes credentials ad is highly unrecommended.