chore(deps): update safe Rust crates

[Coldaine]

Updates the lockfile for the smallest low-risk dependency set found in the crate scan:\n\n- clap 4.5.60 -> 4.6.0\n- tempfile 3.26.0 -> 3.27.0\n- which 8.0.1 -> 8.0.2\n\nThe update also pulled in small transitive lockfile refreshes (for example anstream/anstyle-parse) required by clap 4.6.0. No source changes were needed, and cargo test --locked passed.

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[pszymkowiak]

Thanks @Coldaine — lockfile-only update, all within existing Cargo.toml semver ranges.

Verified: clap 4.6.0, tempfile 3.27.0, which 8.0.2. The anstream/anstyle-parse major bumps are transitive deps internal to clap, no impact on RTK APIs. The which simplification (drops rustix/winsafe, adds libc) is a net improvement.

LGTM.