chore: use .gitignore for biome ignore list

[xc2]

Summary

closes #884

Related Issue

Checklist

• I have added changeset via pnpm run change. - no need
• I have updated the documentation. - no need
• I have added tests to cover my changes. - no need

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[chenjiahan]

Thanks! ❤️

If you have time, please help add the same configuration to Rsbuild/Rsdoctor 😄