chore: migrate tooling to Vite+ and pnpm

[b2m9]

Summary

• migrate the repository from npm and standalone tooling to Vite+ and pnpm
• pin the Vite+ setup action and avoid duplicate workflow installs
• simplify the pnpm workspace configuration and enforce a seven-day minimum release age
• update Vite+ to 0.2.6 and align release and contributor guidance

Validation

• vp install --frozen-lockfile
• vp run check (formatting, lint, typecheck, 90 tests, build, publint, and attw)

Prepared with Codex.

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Summary by cubic

Migrate the repo to vite-plus tooling and pnpm to simplify builds, speed CI, and unify checks. CI now uses a pinned Vite+ setup and avoids duplicate installs.

• Refactors

  • Switch to vite-plus (vp) and pnpm; replace package-lock.json with pnpm-lock.yaml and add a workspace with a 7‑day minimum release age.
  • Add vite.config.ts and tsconfig.test.json; remove vitest.config.ts and tsconfig.build.json; tests now import from vite-plus/test.
  • Update package.json: ESM export ./dist/index.mjs, types ./dist/index.d.mts, and scripts rewritten to vp commands.
  • CI uses voidzero-dev/setup-vp, runs vp install --frozen-lockfile and vp run check, and avoids duplicate workflow installs.
  • Docs aligned for new commands; removed .oxfmtrc.json.

• Migration

  • Install and validate with: vp install --frozen-lockfile then vp run check; iterate with vp test run (or vp test).
  • Use Node >=22 and pnpm v11+ (repo pins pnpm@11.7.0).
  • No runtime or API changes; package remains ESM-only.

^{Written for commit 4d8ba0f. Summary will update on new commits.}

[cubic-dev-ai]

No issues found across 19 files

_{Re-trigger cubic}