Topic Whitelisting/Blacklisting

[kydos]

It would be useful to be able to control by configuration the DDS topics that should not be exposed via zenoh resources or viceversa the set of those that should be.

[JEnoch]

Whiltelisting is implemented via the --allow option.
However blacklisting is not, since the regular expression accepted by this option doesn't support negative matching. The cause being the regex crate that we use (see rust-lang/regex#127).

[JEnoch]

PR #68 adds the deny configuration (via config file) and the --deny command line option.
If both allow and deny are set a partition and/or topic will be allowed if it matches only the allow expression.