Migrate to eslint flat config

eslint.config.js

@@ -0,0 +1,74 @@
+import js from '@eslint/js';
+import importPlugin from 'eslint-plugin-import';
+import jsdocPlugin from 'eslint-plugin-jsdoc';
+// import unicornPlugin from 'eslint-plugin-unicorn';
+import globals from 'globals';
+
+/** @type { import('eslint').Linter.FlatConfig[] } */
+export default [
+  {
+    ignores: [
+      '.github/**/*.*',
+      '.idea/**/*.*',
+      '.vscode/**/*.*',
+      'build/**/*.*',
+      'coverage/**/*.*',
+      'dist/**/*.*',
+      'public/**/*.*',
+      'types/**/*.*',
+      'node_modules/**/*.*',
+    ],
+  },
+  {
+    languageOptions: {
+      globals: {
+        ...globals.jest,
+        ...globals.browser,
+        ...globals.node,
+        ...globals.es2021,
+      },
+      parserOptions: {
+        ecmaVersion: 'latest',
+        sourceType: 'module',
+        ecmaFeatures: {
+          jsx: true,
+        },
+      },
+    },
+    files: ['**/*.{js,jsx,mjs,cjs,ts,tsx}'],
+    plugins: {
+      import: importPlugin,
+      jsdoc: jsdocPlugin,
+      // unicorn: unicornPlugin,
+    },
+    rules: {
+      ...js.configs.recommended.rules,
+      'no-unused-vars': 'warn',
+      'prefer-arrow-callback': 'warn',
+      'prefer-template': 'warn',
+      'import/extensions': ['warn', 'always'],
+      'jsdoc/require-jsdoc': [
+        'warn',
+        {
+          require: {
+            FunctionDeclaration: true,
+            MethodDefinition: true,
+            ClassDeclaration: false,
+            ArrowFunctionExpression: false,
+            FunctionExpression: false,
+          },
+        },
+      ],
+      'jsdoc/check-indentation': 1,
+      'jsdoc/check-line-alignment': 1,
+      'jsdoc/check-syntax': 1,
+      'jsdoc/require-asterisk-prefix': 1,
+      'jsdoc/require-description': 1,
+      'jsdoc/require-description-complete-sentence': 1,
+      'jsdoc/require-hyphen-before-param-description': 1,
+      'jsdoc/require-throws': 1,
+      'jsdoc/sort-tags': 1,
+      'jsdoc/no-undefined-types': 0,
+    },
+  },
+];