rust-1.93

Up-to-date Rust 1.93.1 language and standard library skill. Use when writing, reviewing, debugging, or migrating Rust code, working with std modules, ownership/lifetimes, traits/generics, collections, error handling, smart pointers, closures, iterators, modules, testing, and the standard library (Vec, String, HashMap, Option, Result, Box, Rc, Arc, Cell, RefCell, Path, I/O). Based on official rust-lang/rust source analysis.