Rules_julia_depot: Simple Manifest/depo driven Bazel rules for Julia

We have been having some problems with our build tooling for several multi language monorepos at work where we mix together Python, Julia, Go, Docker/Podman (OCI) containers, etc. Doing small things like getting a proper depot closure from a Manifest, building a sysimage, etc as part of a build was being done manually everywhere, and things that worked one day seemed to break the next. One day I just couldn’t take it anymore and we decided to bring everything under Bazel so we could have singl...