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/lodash/_getFuncName.js

@@ -0,0 +1,31 @@
+var realNames = require('./_realNames');
+
+/** Used for built-in method references. */
+var objectProto = Object.prototype;
+
+/** Used to check objects for own properties. */
+var hasOwnProperty = objectProto.hasOwnProperty;
+
+/**
+ * Gets the name of `func`.
+ *
+ * @private
+ * @param {Function} func The function to query.
+ * @returns {string} Returns the function name.
+ */
+function getFuncName(func) {
+  var result = (func.name + ''),
+      array = realNames[result],
+      length = hasOwnProperty.call(realNames, result) ? array.length : 0;
+
+  while (length--) {
+    var data = array[length],
+        otherFunc = data.func;
+    if (otherFunc == null || otherFunc == func) {
+      return data.name;
+    }
+  }
+  return result;
+}
+
+module.exports = getFuncName;