Setup ESLint

Scope

• Confirm the project and CI can satisfy Node.js ^20.19.0 || ^22.13.0 || >=24
• Ensure eslint and @zhangyu1818/eslint-config are in devDependencies
• Create or update eslint.config.* using defineConfig
• Derive presets from project dependencies and structure
• Add lint scripts when missing

Workflow

1. Inspect project (package.json, lockfiles, Node version/engines, existing ESLint configs)
2. Confirm the project can move to Node.js ^20.19.0 || ^22.13.0 || >=24; if not, stop and report the blocker
3. Install or upgrade deps (eslint@^10 and @zhangyu1818/eslint-config)
4. Create or update eslint.config.* (prefer existing flat-config extension; otherwise eslint.config.mjs)
5. Configure presets based on detected stack
6. Add scripts if missing
7. Verify if requested