add missing file

Author: kibertoad

eslint.config.mjs

@@ -0,0 +1,17 @@
+import compat from 'eslint-plugin-compat';
+
+export default [
+  {
+    // Ignore everything except lib/
+    ignores: ['**', '!lib/**'],
+  },
+  {
+    // Only check browser API compat in the runtime library code.
+    // All other linting is handled by oxlint.
+    ...compat.configs['flat/recommended'],
+    files: ['lib/**/*.js'],
+    linterOptions: {
+      reportUnusedDisableDirectives: 'off',
+    },
+  },
+];