Add example and/or VI to make folder if non-exists on remote

[volks73]

From @jimkring in https://github.com/fieldrndservices/libssh2-labview/issues/51#issuecomment-1146891921:

One last thought: Maybe adding an mkdir -p $UPLOAD_FOLDER SSH command to the SFTP and SCP example VIs would help users avoid possible errors. This could be encapsulated into a VI that looks like the shipping (with LabVIEW) VI that does the same or the OpenG VI "Create Folder if Non-Existent.vi". Just a thought...