chore(mon-pix): migrate eslint to flat config format

mon-pix/eslint.config.cjs

@@ -0,0 +1,144 @@
+const emberRecommendedConfig = require('eslint-plugin-ember/configs/recommended');
+const emberGjsRecommendedConfig = require('eslint-plugin-ember/configs/recommended-gjs');
+const qunitRecommendedConfig = require('eslint-plugin-qunit/configs/recommended');
+const prettierRecommendedConfig = require('eslint-plugin-prettier/recommended');
+const nRecommendedConfig = require('eslint-plugin-n').configs['flat/recommended'];
+const pixRecommendedConfig = require('@1024pix/eslint-plugin/config');
+const globals = require('globals');
+const babelParser = require('@babel/eslint-parser');
+const emberParser = require('ember-eslint-parser');
+
+const unconventionalJsFiles = ['blueprints/**/files/*', 'app/vendor/*'];
+const compiledOutputFiles = ['dist/*', 'tmp/*'];
+const dependenciesFiles = ['bower_components/*', 'node_modules/*'];
+const miscFiles = ['coverage/*', '!**/.*', '**/.eslintcache'];
+const emberTryFiles = ['.node_modules.ember-try/*', 'bower.json.ember-try', 'package.json.ember-try'];
+const phraseGeneratedFiles = ['translations/*.json', '!translations/en.json', '!translations/fr.json'];
+
+const nodeFiles = [
+  'eslint.config.cjs',
+  '.template-lintrc.js',
+  'ember-cli-build.js',
+  'testem.js',
+  'blueprints/*/index.js',
+  'config/**/*.js',
+  'lib/*/index.js',
+  'server/**/*.js',
+];
+
+const emberPatchedParser = Object.assign(
+  {
+    meta: {
+      name: 'ember-eslint-parser',
+      version: '*',
+    },
+  },
+  emberParser,
+);
+
+module.exports = [
+  ...pixRecommendedConfig,
+  ...emberRecommendedConfig,
+  ...emberGjsRecommendedConfig,
+  qunitRecommendedConfig,
+  prettierRecommendedConfig,
+  {
+    ignores: [
+      ...unconventionalJsFiles,
+      ...compiledOutputFiles,
+      ...dependenciesFiles,
+      ...miscFiles,
+      ...emberTryFiles,
+      ...phraseGeneratedFiles,
+    ],
+  },
+  {
+    languageOptions: {
+      globals: {
+        ...globals.browser,
+      },
+
+      parser: babelParser,
+      ecmaVersion: 2018,
+      sourceType: 'module',
+
+      parserOptions: {
+        requireConfigFile: false,
+
+        babelOptions: {
+          plugins: [
+            [
+              '@babel/plugin-proposal-decorators',
+              {
+                decoratorsBeforeExport: true,
+              },
+            ],
+          ],
+        },
+      },
+    },
+
+    rules: {
+      'no-console': 'error',
+      'no-duplicate-imports': 'error',
+
+      'no-restricted-imports': [
+        'error',
+        'lodash',
+        {
+          name: '@ember/test-helpers',
+          importNames: ['render', 'visit', 'find'],
+          message:
+            "Please import 'render' from '@1024pix/ember-testing-library'.\n Please import 'visit' from '@1024pix/ember-testing-library'.\n. 'find' should be replaced with '@1024pix/ember-testing-library' 'find...'/'get...'/'query...' methods to enforce accessible usages.",
+        },
+      ],
+
+      'ember/avoid-leaking-state-in-ember-objects': 'off',
+      'ember/no-get': ['error'],
+      'ember/no-empty-attrs': 'error',
+      'ember/no-new-mixins': 'off',
+      'ember/no-restricted-resolver-tests': 'off',
+      'ember/use-ember-data-rfc-395-imports': 'error',
+
+      'ember/order-in-models': [
+        'error',
+        {
+          order: ['attribute', 'relationship', 'single-line-function', 'multi-line-function'],
+        },
+      ],
+
+      'ember/no-mixins': 'off',
+      'no-irregular-whitespace': 'off',
+    },
+  },
+  {
+    files: ['**/*.gjs'],
+    languageOptions: {
+      parser: emberPatchedParser,
+      sourceType: 'module',
+    },
+  },
+  {
+    ...nRecommendedConfig,
+    files: nodeFiles,
+
+    languageOptions: {
+      globals: {
+        ...globals.node,
+      },
+
+      ecmaVersion: 5,
+      sourceType: 'script',
+    },
+  },
+  {
+    files: ['tests/**/*.js', 'tests/**/*.gjs'],
+
+    languageOptions: {
+      globals: {
+        ...globals.embertest,
+        server: false,
+      },
+    },
+  },
+];