Provide better gjs/gts config support for eslint 9

eslint.config.js

@@ -235,4 +235,30 @@ module.exports = [
       'unicorn/filename-case': 'off',
     },
   },
+  {
+    files: ['**/*.mjs'],
+    languageOptions: {
+      parser: babelEslintParser,
+      parserOptions: {
+        ecmaFeatures: { modules: true },
+        ecmaVersion: 2022,
+        babelOptions: {
+          configFile: require.resolve('./.babelrc'),
+        },
+      },
+    },
+    rules: {
+      // Extensions are required in ESM
+      'import/extensions': ['error', 'ignorePackages'],
+      // These don't appear to work correctly
+      // All these throw on the import of a dependency
+      'import/namespace': 'off',
+      'import/no-deprecated': 'off',
+      'import/default': 'off',
+      'import/no-named-as-default': 'off',
+      'import/no-named-as-default-member': 'off',
+      'import/no-unresalved': 'off',
+      'import/no-missing-import': 'off',
+    },
+  },
 ];

lib/recommended.mjs

@@ -0,0 +1,63 @@
+import emberPlugin from './index.js';
+import baseRules from './recommended-rules.js';
+import gjsRules from './recommended-rules-gjs.js';
+import gtsRules from './recommended-rules-gts.js';
+import emberParser from 'ember-eslint-parser';
+
+export const plugin = emberPlugin;
+export const parser = emberParser;
+
+export const base = {
+  files: ['**/*.{js,ts}'],
+  plugins: { ember: emberPlugin },
+  rules: {
+    ...baseRules,
+  },
+};
+
+export const gjs = {
+  plugins: { ember: emberPlugin },
+  files: ['**/*.gjs'],
+  languageOptions: {
+    parser: emberParser,
+    parserOptions: {
+      ecmaFeatures: { modules: true },
+      ecmaVersion: 'latest',
+      // babel config options should be supplied in the consuming project
+    },
+  },
+  processor: 'ember/noop',
+  rules: {
+    ...base.rules,
+    ...gjsRules,
+  },
+};
+
+export const gts = {
+  plugins: { ember: emberPlugin },
+  files: ['**/*.gts'],
+  languageOptions: {
+    parser: emberParser,
+    parserOptions: {
+      extraFileExtensions: ['.gts'],
+    },
+    // parser options should be supplied in the consuming project
+  },
+  processor: 'ember/noop',
+  rules: {
+    ...base.rules,
+    ...gtsRules,
+  },
+};
+
+export default {
+  // Helpful utility exports
+  plugin,
+  parser,
+  // Recommended config sets
+  configs: {
+    base,
+    gjs,
+    gts,
+  },
+};

package.json

@@ -23,6 +23,9 @@
   "license": "MIT",
   "exports": {
     ".": "./lib/index.js",
+    "./recommended": {
+      "import": "./lib/recommended.mjs"
+    },
     "./configs/*": "./lib/config/*.js"
   },
   "main": "./lib/index.js",