ESLint config for XO

ESLint shareable config for the XO linter, designed for advanced users who prefer to use ESLint directly. Current version 0.51.0 requires ESLint 10 and Node.js 20.19+. Includes over 400 rules from plugins like Unicorn, import-x, n, stylistic, typescript-eslint, and ava. Key differentiator: enforces a strict, opinionated style (tabs by default, semicolons, no jQuery, etc.) and merges TypeScript config in recent versions. Active development cadence with major breaking changes each year.