Add safety checks if Item folder (or files within) are symlinks?

[pjotrek-b]

To avoid unnecessary moving/copying of large source data, CInbox supports symbolic links as Item folders.

However, this means that CInbox will be working in the source - which calls for extra caution!

Ideas:
If the Item folder is a symlink...

1. Do NOT delete anything
2. Rather move/rename instead

[pjotrek-b]

Better idea:

if Item folder is a symbolic link, then:

1. Enter a "link-state"
2. Which then turns that symlink folder into a real one
3. But symlinks all files into that processing folder

This should allow being able to work with the item like CInbox is used to, but should work even on a read-only source.

This workflow must work for digital film as source from an external HDD.