Ignore dot underscore file with WebDAV drive on macOS

Copying files (pictures) to Nuxeo using a WebDAV drive produces ._ files which correspond to the standard way of creating content by macOS on network drives : https://support.apple.com/en-us/HT208209

The behavior seems to be inconsistent depending on the computers and the file systems (HFS+, APFS), without taking into account Apple's workaround to use defaults write com.apple.desktopservices DSDontWriteNetworkStores -bool TRUE.

So the best way to have something consistent is to globally ignore these files.