ESLint Formatter GCQ

An opinionated ESLint formatter that outputs GitLab Code Quality compatible JSON (v0.0.5, last updated 2024). It always writes a stylish formatted report to the terminal and JSON to the ESLint output. Supports ESLint 8.x, 9.x, and 10.x. Differentiator: simplifies GitLab CI integration by producing both console output and the required codequality.json artifact in one pass.