chore: format & lint directly from root package

[davidkna-sap]

Context

Closes SAP/ai-sdk-js-backlog#ISSUENUMBER.

Should be faster and catches more files. Edit: roughly 2x as fast in CI.

What this PR does and why it is needed

[hyperspace-pr-bot]

Summary

The following content is AI-generated and provides a summary of the pull request:

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Chore: Run Format & Lint Directly from Root Package

What this PR does and why it is needed

This PR consolidates the lint and lint:fix scripts to run formatting (oxfmt) and linting (oxlint) directly from the root package.json, instead of delegating to each individual package via pnpm -r run. This change is faster (roughly 2x speedup in CI) and also catches more files across the repository.

Key changes:

• package.json: Updated lint and lint:fix scripts to invoke oxlint and oxfmt directly at the root level, covering the entire monorepo in a single pass.
• .oxfmtrc.json: Added .changeset/ and test-util/data to the ignore patterns, and ensured CHANGELOG.md is also excluded to avoid formatting noise.
• .oxlintrc.json: Re-formatted arrays and objects to match the new consistent style (e.g., collapsed single-item arrays, reformatted plugin declarations).
• vitest.shared.ts: Added explicit UserWorkspaceConfig return type to definePackageConfig and cleaned up trailing commas.
• Various config & doc files (.github/, adr/, scripts/, styles/, etc.): Purely formatting fixes — trailing whitespace removal, consistent single-quote usage, indentation normalization, and minor whitespace cleanup — all applied automatically by the formatter now running from the root.

Category: 🔧 Chore

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PR Bot Information

Version: 1.29.30

• LLM: anthropic--claude-4.6-sonnet
• Correlation ID: 05267790-9af8-11f1-967e-e7c6cec24986
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