Migrate ESLint configuration to flat config for v9 compatibility#374

rajbos merged 4 commits intodependabot/npm_and_yarn/npm-updates-5ea1bee7e8devops-actions/json-to-file:dependabot/npm_and_yarn/npm-updates-5ea1bee7e8from

copilot/sub-pr-362devops-actions/json-to-file:copilot/sub-pr-362Copy head branch name to clipboard