Add eslint.config.js (WIP - investigating CI failures)

Author: Copilot

eslint.config.js

@@ -0,0 +1,27 @@
+import {FlatCompat} from '@eslint/eslintrc'
+import {fileURLToPath} from 'url'
+import path from 'path'
+
+const __filename = fileURLToPath(import.meta.url)
+const __dirname = path.dirname(__filename)
+
+const compat = new FlatCompat({
+  baseDirectory: __dirname,
+  resolvePluginsRelativeTo: path.resolve(__dirname, 'node_modules/eslint-plugin-github'),
+})
+
+export default [
+  {
+    ignores: ['dist/**'],
+  },
+  ...compat.extends('plugin:github/recommended', 'plugin:github/browser', 'plugin:github/typescript'),
+  {
+    files: ['**/*.js'],
+    languageOptions: {
+      parser: (await import('espree')).default,
+      parserOptions: {
+        ecmaVersion: 8,
+      },
+    },
+  },
+]