[$] Rust for filesystems

At the2024 Linux Storage,Filesystem, Memory Management, and BPF Summit, Wedson Almeida Filho andKent Overstreet led a combined storage and filesystem session on using Rustfor Linux filesystems. Back in December 2023, Almeida had postedan RFC patch set withsome Rust abstractions for filesystems, which resulted in some disagreement over the approach. On thesame mid-May day as the session, he posteda second version of the RFC patches, which he wanted to discuss along withother Rust-related topics.