chore: update lint to use esm-only module

Author: owlstronaut

.eslint.config.js

@@ -0,0 +1,10 @@
+import github from 'eslint-plugin-github'
+
+export default [
+  // Don't use spread operator - these aren't arrays
+  github.getFlatConfigs().react,
+  {
+    // This lets your .eslintrc.js handle most configuration
+    ignores: ['.cache/**', 'public/**']
+  }
+]

.eslintrc.js

@@ -3,14 +3,13 @@ const {getGlobals} = require('eslint-plugin-mdx')
 module.exports = {
   root: true,
   ignorePatterns: ['.cache/', 'public/'],
-  plugins: ['primer-react', 'github'],
+  plugins: ['primer-react'], // github plugin now comes from flat config
   extends: [
     '@npmcli',
     'react-app',
-    // 'react-app/jest',
     'eslint:recommended',
     'plugin:react/recommended',
-    'plugin:github/react',
+    // 'plugin:github/react',  // REMOVED: now handled by flat config
     'plugin:react-hooks/recommended',
     'prettier',
   ],