Before this change, using convmv to convert filenames between NFD and NFC could
fail on certain backends (such as onedrive) that were insensitive to the
difference. This change fixes the issue by extending the existing
needsMoveCaseInsensitive logic for use in this scenario.
convmv supports advanced path name transformations for converting and renaming
files and directories by applying prefixes, suffixes, and other alterations.
For example:
rclone convmv "stories/The Quick Brown Fox!.txt" --name-transform "all,uppercase"
// Output: STORIES/THE QUICK BROWN FOX!.TXT
See help doc for complete details.