fix eslint flat config

Author: aprendendofelipe

README.md

@@ -6,8 +6,7 @@ ESLint rules for Primer React
 
 ## Installation
 
-1. Assuming you already have [ESLint](https://www.npmjs.com/package/eslint) and
-   [Primer React](https://github.com/primer/react) installed, run:
+Assuming you already have [ESLint](https://www.npmjs.com/package/eslint) and [Primer React](https://github.com/primer/react) installed, run:
 
    ```shell
    npm install --save-dev eslint-plugin-primer-react
@@ -17,8 +16,29 @@ ESLint rules for Primer React
    yarn add --dev eslint-plugin-primer-react
    ```
 
-2. In your [ESLint configuration file](https://eslint.org/docs/user-guide/configuring/configuration-files), extend the
-   recommended Primer React ESLint config:
+## Setup
+
+### Flat Configuration (`eslint.config.js`)
+
+In your [`eslint.config`](https://eslint.org/docs/user-guide/configuring/configuration-files) file, import `eslint-plugin-primer-react` and extend the recommended configuration using `getFlatConfigs()`:
+
+```js
+import pluginPrimerReact from 'eslint-plugin-primer-react'
+
+export default [
+  pluginPrimerReact.getFlatConfigs().recommended,
+  {
+    rules: {
+      'primer-react/no-system-props': 'error',
+      // other custom rules...
+    },
+  },
+]
+```
+
+### Legacy Configuration (`.eslintrc.js`)
+
+In your [`.eslintrc`](https://eslint.org/docs/latest/use/configure/configuration-files-deprecated) file, extend the recommended Primer React ESLint config:
 
    ```js
    {

eslint.config.js

@@ -17,7 +17,7 @@ module.exports = [
       },
     },
     rules: {
-      'importPlugin/no-commonjs': 'off',
+      'import/no-commonjs': 'off',
       'no-shadow': 'off',
       'no-unused-vars': [
         'error',
@@ -35,18 +35,14 @@ module.exports = [
         ...pluginJest.environments.globals.globals,
       },
     },
-  },
-  {
-    files: ['.eslint.config.js', '.markdownlint-cli2.cjs'],
     rules: {
-      'filenames/match-regex': 'off',
-      'github/filenames-match-regex': 'off',
+      'i18n-text/no-en': 'off',
     },
   },
   {
-    files: ['src/url.js', 'src/rules/new-color-css-vars.js'],
+    files: ['.markdownlint-cli2.cjs'],
     rules: {
-      'importPlugin/extensions': 'off',
+      'github/filenames-match-regex': 'off',
     },
   },
 ]