turborepo

af01fdfe - fix: Collapse nested package-manager fallback conditional (#13279)

fix: Collapse nested package-manager fallback conditional (#13279) ## Why `Lint / Rust clippy` is failing on main: the nested `if` introduced in #13275 trips `clippy::collapsible_if` under `RUSTFLAGS=-D warnings`, blocking CI for every open PR (surfaced on #13277's merge-commit run). ## What Collapse the nested `if`/`if let` into a let-chain per clippy's suggestion. No behavior change. ## How to verify `RUSTFLAGS="-D warnings" cargo clippy -p turborepo-napi --all-targets` passes.