[Feature Request] Programmatic temporary rules

I searched the issues and couldn't find anything similar. If I missed something, sorry about that.

### Summary:
I am trying to automate opensnitch rules. At the moment, we can manually add rules to the rules folder, although I'm having some trouble getting opensnitch to actually load those rules. But I'm actually most interested in setting temporary 12h rules, so writing persistent rule files to disk and then cleaning them up is a drag.

I'd love to have direct access via a CLI to add temporary rules to the process itself, and let OpenSnitch handle the purging of expired rules.

Something like `opensnitch add-rule 12h dest.host $someip process.path /usr/bin/someapp` would be quite helpful.

For the curious, the principal motivation here is to reduce notification fatigue in common programs by automatically gathering destination ips and making temporary rules out of them. I don't want them to be permanent, but I do want to reduce the amount of time I spent in the OpenSnitch UI.