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/_arrayReduceRight.js

@@ -0,0 +1,24 @@
+/**
+ * A specialized version of `_.reduceRight` for arrays without support for
+ * iteratee shorthands.
+ *
+ * @private
+ * @param {Array} [array] The array to iterate over.
+ * @param {Function} iteratee The function invoked per iteration.
+ * @param {*} [accumulator] The initial value.
+ * @param {boolean} [initAccum] Specify using the last element of `array` as
+ *  the initial value.
+ * @returns {*} Returns the accumulated value.
+ */
+function arrayReduceRight(array, iteratee, accumulator, initAccum) {
+  var length = array == null ? 0 : array.length;
+  if (initAccum && length) {
+    accumulator = array[--length];
+  }
+  while (length--) {
+    accumulator = iteratee(accumulator, array[length], length, array);
+  }
+  return accumulator;
+}
+
+module.exports = arrayReduceRight;