Install release dependencies with pnpm

[VdustR]

Summary

• install release-job dependencies with the repository-pinned pnpm 11.12.0
• keep Vite+ as the quality/build toolchain while making the Changesets subprocess use dependencies installed by its own package manager

Failure evidence

After pnpm setup succeeded, changeset version reached changelog formatting but pnpm exec oxfmt exited 1 against dependencies installed by vp install. The same release plan succeeds locally with the exact pnpm 11.12.0 pin. Installing the release job with pnpm keeps the frozen lockfile and platform-specific optional dependencies aligned with the command Changesets executes.

Verification

• pnpm@11.12.0 install --frozen-lockfile
• pnpm@11.12.0 exec oxfmt --write --no-error-on-unmatched-pattern packages/likftc/CHANGELOG.md
• changeset version produced the expected 1.1.1 release plan in a disposable diagnostic run
• vp fmt --check .github/workflows/ci.yml
• git diff --check

The decisive verification is the main-branch release job creating the Changesets release PR.

[VdustR]

@codex review

[chatgpt-codex-connector]

Codex Review: Didn't find any major issues. 🚀

Reviewed commit: f5e93af627

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