Move the author update script from Kotlin to TypeScript, including tests.
Changes:
- Create scripts-ts/src/updateAuthors.ts
- Create scripts-ts/src/updateAuthors.test.ts with vitest
- Add vitest to package.json
- Create scriptsTests.yml workflow for running tests
- Update updateAuthors.yml workflow to use Node.js
- Remove Kotlin implementation and test
- Remove unused github-api dependency
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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
