Prevent ESLint v10 updates until plugin ecosystem compatibility

[Copilot]

PR #5 (Dependabot) fails CI because ESLint v10 breaks peer dependency compatibility. Current plugins (eslint-plugin-jsx-a11y@6.10.2, eslint-plugin-react-hooks@7.0.1) only support ESLint ≤9.

Repository is healthy - all checks pass with current eslint@9.39.1. No code changes needed.

Changes

• Investigation doc (docs/ci-failure-investigation.md)

  • Root cause: ESLint v10 incompatible with jsx-a11y and react-hooks plugins
  • Plugin compatibility matrix and adoption timeline
  • Monitoring strategy for future v10 migration

• Dependabot config (.github/dependabot.yml)

  • Ignore ESLint major version updates
  • Prevents premature v10 adoption until plugins catch up

Error from PR #5

npm error While resolving: eslint-plugin-jsx-a11y@6.10.2
npm error Found: eslint@10.0.0
npm error peer eslint@"^3 || ^4 || ^5 || ^6 || ^7 || ^8 || ^9"
npm error Conflicting peer dependency

Recommendation

Close PR #5. Monitor plugin repos for ESLint v10 support before upgrading.

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