Previewing the new Rust packaging model for Guix

UPDATE 2025-06-08 : Blog post published at: https://guix.gnu.org/en/blog/2025/a-new-rust-packaging-model/ . UPDATE 2025-04-30 : Switched to hash table for Cargo inputs lookup. Renamed cargo-inputs in the example to my-cargo-inputs to avoid conflicts with rust-team merge. On the next merge of rust-team branch, Guix will support importing Rust dependencies from the generated lockfile Cargo.lock. A…