chore: Migrate to ESlint v9

Author: christophblessing

.eslintrc.cjs

@@ -0,0 +1,38 @@
+import js from '@eslint/js';
+import tsPlugin from '@typescript-eslint/eslint-plugin';
+import tsParser from '@typescript-eslint/parser';
+import globals from 'globals';
+
+export default [
+  {
+    ignores: ['node_modules/**', 'dist/**'],
+  },
+
+  // Base JS config for all files
+  {
+    ...js.configs.recommended,
+    files: ['**/*.js', '**/*.mjs', '**/*.cjs'],
+    languageOptions: {
+      globals: { ...globals.node }, // Add Node.js globals
+    },
+  },
+
+  // TypeScript specific config
+  {
+    files: ['**/*.ts', '**/*.tsx'],
+    plugins: {
+      '@typescript-eslint': tsPlugin,
+    },
+    languageOptions: {
+      parser: tsParser,
+      parserOptions: {
+        project: ['./tsconfig.json', './tsconfig.node.json'],
+        ecmaVersion: 'latest',
+        sourceType: 'module',
+      },
+    },
+    rules: {
+      ...tsPlugin.configs.recommended.rules,
+    },
+  },
+];