I would love Rust support. There are multiple static site generators like Cobalt and Zola. Why Rust is better than Node? Cause its fun. I like writing Rust and writing my website in it would be good practice.
Assuming your build process is to clone the entire repo to a jenkins machine and run the build command, the easiest way to achieve this would be to just install cargo on the jenkins VMs. Might need some file access protections and to revoke syscall privileges I dunno. You don’t need to cache common crates until people are building rust generators regularly.