style: add eslint styling

eslint.config.mjs

@@ -0,0 +1,37 @@
+import globals from 'globals'
+import pluginJs from '@eslint/js'
+import tseslint from 'typescript-eslint'
+import prettierPlugin from 'eslint-plugin-prettier/recommended'
+import prettierConfig from 'eslint-config-prettier'
+
+/** @type {import('eslint').Linter.Config[]} */
+export default [
+  { files: ['**/*.{js,mjs,cjs,ts}'] },
+  { languageOptions: { globals: globals.node } },
+  pluginJs.configs.recommended,
+  ...tseslint.configs.recommended,
+  prettierConfig,
+  prettierPlugin,
+  {
+    rules: {
+      '@typescript-eslint/no-unused-vars': [
+        'error',
+        {
+          args: 'all',
+          argsIgnorePattern: '^_',
+          caughtErrors: 'all',
+          caughtErrorsIgnorePattern: '^_',
+          destructuredArrayIgnorePattern: '^_',
+          varsIgnorePattern: '^_',
+          ignoreRestSiblings: true
+        }
+      ],
+      '@typescript-eslint/no-explicit-any': [
+        'error',
+        {
+          fixToUnknown: true
+        }
+      ]
+    }
+  }
+]