* build(deps): upgrade wasmtime C API to 48.0.0
Upgrade the Rust and Zig Wasmtime dependencies and enable reference values with the null GC collector.
Wasmtime 48 requires a newer Rust toolchain, whose Clippy version identifies three item helpers that can be const. Mark them const so the workspace continues to pass Clippy with warnings denied.
* feat(benchmark): support Wasm grammars
* perf(wasm): cache language function handles
* fix(wasm): improve validation and failure cleanup
Bounds-check dylink metadata parsing, require exact import and export names, and restore memory and function-table allocation offsets when language loading fails.
* fix(wasm): copy the complete supertype map
Problem: `zig fetch` on 0.16 can't download zip archives, which wasmtime
uses for Windows. This makes `cargo xtask upgrade-wastime` fail silently
with empty hashes for these platforms.
Solution: Re-run xtask with Zig 0.17 nightly.
Zig 0.14 changed how package hashes are computed and used, and if the
old package hashes are left, every call to `zig build` will re-download
every package every time. Updating to the new hash format solves this.
Make this usable as a dependency of a zig 0.12 project:
- build.zig.zon must exist to be used as a zig dependency
- public headers need to be installed as part of the artifact
