Improve handling of directory renames / moves

[srid]

Emanote (via Ema.Helper.FileSystem) does not handle renames and moving of directories as we would expect ... thus requiring the user to restart emanote when these things happen. Instead, we should automate it. Either by handing the updated files recursively (error prone?) or by restarting the internal model state tracker ourselves.

[srid]

Even file moves (mv foo.md bar/qux/foo.md) can lead to inconsistent internal state, leading to errors like this:

[Debug#WS.Client.10] <~~ ["brazil-cerrado"]
attempt to encode a non-existance note route: Identity R[/2021-09-21.md]
CallStack (from HasCallStack):
  error, called at src/Relude/Debug.hs:218:11 in relude-0.7.0.0-CnCT2EZE7nm5s1uXLlAUNA:Relude.Debug
  error, called at src/Emanote/Route/SiteRoute/Class.hs:90:22 in main:Emanote.Route.SiteRoute.Class
  encodeResourceRoute, called at src/Emanote/Route/SiteRoute/Class.hs:52:11 in main:Emanote.Route.SiteRoute.Class

[srid]

Relevant on the fsnotify side: fsnotify/fsnotify#26

[srid]

1a8e922 should be good enough for now.