add eslint

eslint.config.mjs

@@ -0,0 +1,26 @@
+import globals from "globals";
+import pluginJs from "@eslint/js";
+
+
+export default [
+  {
+    files: ["**/*.js"],
+    languageOptions: {
+      sourceType: "commonjs",
+    },
+  },
+  {
+    languageOptions: {
+      globals: globals.node,
+    },
+  },
+  pluginJs.configs.recommended,
+  {
+    rules: {
+      "comma-dangle": ["error", "always-multiline"],
+      complexity: ["error", 8],
+      quotes: ["error", "double"],
+      semi: ["error", "always"],
+    },
+  },
+];