chore: upgrade ESLint to v10 with flat config

eslint.config.mjs

@@ -0,0 +1,83 @@
+import js from '@eslint/js';
+import tseslint from 'typescript-eslint';
+import jestPlugin from 'eslint-plugin-jest';
+import nodePlugin from 'eslint-plugin-n';
+import eslintConfigPrettier from 'eslint-config-prettier';
+import globals from 'globals';
+
+export default tseslint.config(
+  {
+    ignores: [
+      'dist/',
+      'lib/',
+      'node_modules/',
+      'coverage/',
+      '**/*.js',
+      '**/*.cjs',
+      '**/*.mjs',
+      '**/*.d.ts'
+    ]
+  },
+  {
+    files: ['src/**/*.ts', '__tests__/**/*.ts'],
+    extends: [
+      js.configs.recommended,
+      ...tseslint.configs.recommended,
+      jestPlugin.configs['flat/recommended'],
+      eslintConfigPrettier
+    ],
+    plugins: {
+      n: nodePlugin
+    },
+    languageOptions: {
+      ecmaVersion: 2021,
+      sourceType: 'module',
+      globals: {
+        ...globals.node,
+        ...globals.es2021
+      }
+    },
+    rules: {
+      '@typescript-eslint/no-require-imports': 'error',
+      '@typescript-eslint/no-non-null-assertion': 'off',
+      '@typescript-eslint/no-explicit-any': 'off',
+      '@typescript-eslint/no-empty-function': 'off',
+      '@typescript-eslint/ban-ts-comment': [
+        'error',
+        {
+          'ts-ignore': 'allow-with-description'
+        }
+      ],
+      'no-console': 'error',
+      yoda: 'error',
+      'prefer-const': [
+        'error',
+        {
+          destructuring: 'all'
+        }
+      ],
+      'no-control-regex': 'off',
+      'no-constant-condition': ['error', {checkLoops: false}],
+      // ESLint 10's recommended set adds `preserve-caught-error`, which the
+      // previous ESLint 8 recommended config did not enable. Keep it off to
+      // preserve the prior lint behavior; adopting it would require attaching
+      // an Error `cause` (ES2022) and is out of scope for this upgrade.
+      'preserve-caught-error': 'off',
+      'n/no-extraneous-import': 'error'
+    }
+  },
+  {
+    files: ['**/*{test,spec}.ts'],
+    languageOptions: {
+      globals: {
+        ...globals.jest
+      }
+    },
+    rules: {
+      '@typescript-eslint/no-unused-vars': 'off',
+      'jest/no-standalone-expect': 'off',
+      'jest/no-conditional-expect': 'off',
+      'no-console': 'off'
+    }
+  }
+);