Two new packages for Factory: zenith and lychee

Hello, I wanted to introduce two new packages to Factory: - zenith: https://github.com/bvaisvil/zenith/tree/master - lychee: https://github.com/lycheeverse/lychee I think both would be nice additions to the already rich package base, besides both being written in one of my favorite languages, Rust :-))) The submission request will come in between this evening and tomorrow morning. Special thanks to Martin Sirringhaus that helped me a lot figuring out weird things happening with the build of zenith :-) Alessio