#skip-bb
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<!-- This is an auto-generated description by cubic. -->
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## Summary by cubic
Route PRs from wwwillchen* to a self-hosted macOS ARM64 runner (Mac
mini) and dynamically set the CI matrix; all other authors keep
GitHub-hosted macOS/Windows with sharded e2e. Also simplifies formatting
in lint-staged and bumps the package-lock version.

- **New Features**
- Detect privileged authors (wwwillchen, wwwillchen-bot) and run
build/e2e on self-hosted macOS ARM64 with no sharding.
  - For others, run on GitHub-hosted macOS + Windows with 4 e2e shards.
- Expose dynamic matrix outputs (build_os, e2e_os, e2e_shard,
e2e_shard_total) and use fromJSON for runner labels.

- **Refactors**
- e2e now also depends on check-changes; E2E step name reflects dynamic
shard total.
- lint-staged: run oxfmt on all files with
--no-error-on-unmatched-pattern.
  - package-lock updated to 0.36.0-beta.2.

<sup>Written for commit 5d99b98267104283d9dce0dda983c6305ab37599.
Summary will update on new commits.</sup>

<!-- End of auto-generated description by cubic. -->