build: convert repo from npm to pnpm

[DylanPiercey]

Converts the repo from npm to pnpm (pnpm 11.15.1).

• Imported package-lock.json into pnpm-lock.yaml via pnpm import (preserves resolved versions) and removed package-lock.json.
• Added "packageManager": "pnpm@11.15.1" to package.json.
• Converted npm-isms in scripts: npm ci -> pnpm install --frozen-lockfile, npm i --package-lock-only -> pnpm install --lockfile-only, npm run -> pnpm run.
• CI: added pnpm/action-setup@v6 before setup-node, cache: pnpm, pnpm install/run; bumped codecov/codecov-action v6 -> v7.
• Updated husky pre-commit (npm exec lint-staged -> pnpm exec lint-staged), .prettierignore (package-lock.json -> pnpm-lock.yaml), and added lockfile ignores to .gitignore.
• Release flow uses changesets, which auto-detects pnpm; no workspace: ranges in the manifest so changeset publish is unaffected.

Verification: pnpm install, build (tsc -b && rolldown -c), lint (@ci:lint), and tests (484 passed) all green locally.

[changeset-bot]

⚠️ No Changeset found

Latest commit: c83bc8d

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

This PR includes no changesets

When changesets are added to this PR, you'll see the packages that this PR includes changesets for and the associated semver types

Click here to learn what changesets are, and how to add one.

Click here if you're a maintainer who wants to add a changeset to this PR

[coderabbitai]

Warning

Review limit reached

You’ve reached a temporary PR review limit under our Fair Usage Limits Policy.

Your recent review volume is higher than typical usage, so adaptive limits are currently applied.

Next review available in: 17 minutes

Enable usage-based reviews in Billing to review now. Otherwise, wait until the next included review is available.
You're only billed for reviews past your plan's rate limits ($0.25/file).

How can I continue?

After more reviews become available, a review can be triggered using the @coderabbitai review command as a PR comment. Alternatively, push new commits to this PR.

To avoid repeated limits, reduce automatic review volume by pausing incremental auto-reviews earlier, using label-based review opt-in, excluding WIP or generated PR titles, or requesting reviews manually when the PR is ready. If your team needs uninterrupted high-volume reviews, an organization admin can enable usage-based reviews.

How do review limits work?

CodeRabbit enforces per-developer PR review limits for each organization. Most developers receive the normal plan review availability.

For paid Pro and Pro+ PR reviews, CodeRabbit uses adaptive limits for sustained high-volume activity. When a developer's recent PR review activity reaches the 95th percentile or higher among CodeRabbit users, additional reviews become available more gradually as earlier reviews age out of the rolling window.

Please refer docs for additional details.

Review details

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: fa8ae50e-0618-47cf-a600-0547ab8ca7fb

📥 Commits

Reviewing files that changed from the base of the PR and between 295c45b and c83bc8d.

⛔ Files ignored due to path filters (2)

• package-lock.json is excluded by !**/package-lock.json and included by **
• pnpm-lock.yaml is excluded by !**/pnpm-lock.yaml and included by **

📒 Files selected for processing (5)

• .github/workflows/ci.yml
• .gitignore
• .husky/pre-commit
• .prettierignore
• package.json

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch dpiercey-ws-pnpm-0rjo9g

---

_{Comment @coderabbitai help to get the list of available commands.}

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 96.83%. Comparing base (295c45b) to head (c83bc8d).

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #136   +/-   ##
=======================================
  Coverage   96.83%   96.83%           
=======================================
  Files           8        8           
  Lines         316      316           
  Branches       54       54           
=======================================
  Hits          306      306           
  Misses          4        4           
  Partials        6        6           

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.