Implement source.file.DirectoryWatcher

[nhairs]

This can probably share some logic with source.file.DirectoriesAndFiles.

I'll note that I can probably do a better job of utilising pathlib to do the various path interactions. For example I could use Path(...).iterdir() instead of globbing here:

parsedmarc-fork/src/parsedmarc/source/file.py

Line 62 in 9442a47

for sub_path in map(pathlib.Path, path.rglob("*")):