Upgrade ESLint to v9 with flat config format#322
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Migrate from ESLint 8 to ESLint 9, which requires converting the legacy .eslintrc.json configuration to the new flat config format (eslint.config.js). Changes: - Update eslint to ^9.17.0 - Add @eslint/js, @eslint/compat, and globals packages - Create eslint.config.js with flat config format - Remove .eslintrc.json and .eslintignore (now handled in config) - Update lint scripts to remove deprecated --ext flag - Fix unused catch binding warnings using ES2019+ optional catch binding
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Summary
.eslintrc.jsonto new flat config format (eslint.config.js)@eslint/js,@eslint/compat, andglobalsTest plan
npm installto install updated dependenciesnpm run lintto verify linting works correctlygrunt sandbox