Add linting, formatting and pre-commit (#53)

* Add dev-dependancies

* Security update npm packages

* Force audit fix

* Add linting, formatting and precommit

* Format files

eslint.config.mjs

@@ -0,0 +1,20 @@
+import globals from 'globals';
+import pluginJs from '@eslint/js';
+
+export default [
+  { files: ['**/*.js'], languageOptions: { sourceType: 'commonjs' } },
+  { languageOptions: { globals: { ...globals.browser, ...globals.node } } },
+  pluginJs.configs.recommended,
+  {
+    rules: {
+      'no-unused-vars': [
+        'error',
+        {
+          argsIgnorePattern: '^_',
+          varsIgnorePattern: '^_',
+          caughtErrorsIgnorePattern: '^_',
+        },
+      ],
+    },
+  },
+];