Refactor ESLint configuration: add new CommonJS config and remove old MJS config; update .gitignore to include reference images

Author: CarterIrish

.gitignore

@@ -137,3 +137,6 @@ dist
 # Vite logs files
 vite.config.js.timestamp-*
 vite.config.ts.timestamp-*
+
+# Reference images for CSS
+References/

eslint.config.js

@@ -0,0 +1,14 @@
+const js = require("@eslint/js");
+const globals = require("globals");
+
+module.exports = [
+  js.configs.recommended,
+  {
+    languageOptions: {
+      globals: globals.node,
+    },
+    rules: {
+      "no-console": "warn",
+    },
+  },
+];