Support Inotify WatchFolders

[hdsdi3g]

Via

https://stackoverflow.com/questions/43141838/which-operating-systems-support-native-inotify-like-file-watching-in-java
https://blog.arkey.fr/2019/09/13/watchservice-and-bind-mount/

For "File" WF. But only if Inotify/like is really used, not via a simple poller (need POC).