refactor: Migrate to ESLint v9 (#727)

Author: bennycode

.eslintrc.json

@@ -0,0 +1,19 @@
+import path from 'node:path';
+import {fileURLToPath} from 'node:url';
+import js from '@eslint/js';
+import {FlatCompat} from '@eslint/eslintrc';
+
+const __filename = fileURLToPath(import.meta.url);
+const __dirname = path.dirname(__filename);
+const compat = new FlatCompat({
+  baseDirectory: __dirname,
+  recommendedConfig: js.configs.recommended,
+  allConfig: js.configs.all,
+});
+
+export default [
+  {
+    ignores: ['**/coverage', '**/.dependency-cruiser.cjs', '**/docs', '**/vitest.config.ts'],
+  },
+  ...compat.extends('@tstv/eslint-config'),
+];