Once all ESLint plugin support FlatConfig - [x] use eslint own types (https://eslint.org/blog/2024/09/eslint-v9.10.0-released) - [x] @eslint/js - [x] eslint-plugin-sonarjs - [x] @typescript-eslint/eslint-plugin - [ ] eslint-plugin-import - [x] eslint-plugin-jsdoc - [x] eslint-plugin-perfectionist - [x] eslint-plugin-unicorn - [x] eslint-plugin-react - [x] eslint-plugin-lit - [ ] ⌛️ eslint-plugin-lit-a11y - [x] eslint-plugin-wc - [ ] remove `as unknown as Type` casts and other useless casts in configs