Eslint config 9.0 migration

eslint.config.js

@@ -0,0 +1,69 @@
+import reactPlugin from 'eslint-plugin-react'; // https://github.com/jsx-eslint/eslint-plugin-react?tab=readme-ov-file#configuration
+import globals from 'globals';
+import pluginJs from '@eslint/js';
+import tsEslint from 'typescript-eslint';
+import jsxA11y from 'eslint-plugin-jsx-a11y';
+import tailwind from 'eslint-plugin-tailwindcss';
+import eslintPluginPrettierRecommended from 'eslint-plugin-prettier/recommended';
+
+export default [
+  pluginJs.configs.recommended,
+  jsxA11y.flatConfigs.recommended,
+  ...tsEslint.configs.strict,
+  ...tsEslint.configs.stylistic,
+  eslintPluginPrettierRecommended,
+  ...tailwind.configs['flat/recommended'],
+  {
+    name: 'tailwind-migration',
+    files: ['**/*.{js,mjs,cjs,ts,jsx,tsx}'],
+    rules: {
+      'tailwindcss/no-custom-classname': 0,
+    },
+  },
+  {
+    name: 'ignore-outputs',
+    ignores: ['**/build/', '**/dist/', '**/node_modules/', '**/.next/'],
+  },
+  {
+    name: 'react',
+    files: ['**/*.{js,mjs,cjs,ts,jsx,tsx}'],
+    ...reactPlugin.configs.flat.recommended,
+    languageOptions: {
+      ...reactPlugin.configs.flat.recommended.languageOptions,
+      globals: globals.browser,
+      parserOptions: {
+        ecmaFeatures: { jsx: true },
+      },
+    },
+    rules: {
+      'react/react-in-jsx-scope': 0,
+      'react/jsx-uses-react': 0,
+    },
+  },
+  {
+    name: 'ts-migration-relax',
+    files: ['**/*.{ts,tsx}'],
+    rules: {
+      '@typescript-eslint/no-explicit-any': 'off',
+      '@typescript-eslint/no-empty-interface': 'off',
+      '@typescript-eslint/no-empty-function': 'off',
+    },
+  },
+  {
+    name: 'ts-unused-vars',
+    rules: {
+      '@typescript-eslint/no-unused-vars': [
+        'error',
+        {
+          args: 'all',
+          argsIgnorePattern: '^_',
+          caughtErrors: 'all',
+          caughtErrorsIgnorePattern: '^_',
+          destructuredArrayIgnorePattern: '^_',
+          varsIgnorePattern: '^_',
+          // ignoreRestSiblings: true, - if you want to ignore unused rest siblings
+        },
+      ],
+    },
+  },
+];