Initial commit: Developer Tools MVP with visual editor

- Complete React app with 7 developer tools
- JSON Tool with visual structured editor
- Serialize Tool with visual structured editor
- URL, Base64, CSV/JSON, Beautifier, Diff tools
- Responsive navigation with dropdown menu
- Dark/light mode toggle
- Mobile-responsive design with sticky header
- All tools working with copy/paste functionality

node_modules/eslint/lib/shared/logging.js

@@ -0,0 +1,30 @@
+/**
+ * @fileoverview Handle logging for ESLint
+ * @author Gyandeep Singh
+ */
+
+"use strict";
+
+/* eslint no-console: "off" -- Logging util */
+
+/* c8 ignore next */
+module.exports = {
+
+    /**
+     * Cover for console.log
+     * @param {...any} args The elements to log.
+     * @returns {void}
+     */
+    info(...args) {
+        console.log(...args);
+    },
+
+    /**
+     * Cover for console.error
+     * @param {...any} args The elements to log.
+     * @returns {void}
+     */
+    error(...args) {
+        console.error(...args);
+    }
+};