sysutils/try-rs: Add port

This is a cool tool (a reimagining of github.com/tobi/try) that creates,
searches, previews, and recalls all those little "what-if" terminal
experiments. Rather than deleting an experiment when you're done (guilty)
or putting all your experiments into one big directory with
incomprehensible names (guilty), it gives you a TUI to search, clone,
enter, edit, delete, etc. It can clone based on existing experiments, or
clone from git repos.

Perhaps most importantly, it comes with themes.