Add an additional `invert` argument to libinotifytools' `inotifytools_ignore_events_by_regex`, which allows the ignore logic in the RETURN(A) macro to be optionally negated.

In `inotifywatch` and `inotifywait`, add `--include` and `--includei` options, allowing regular expressions typically used with `--exclude` and `--excludei` to be easily negated.