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/underscore/cjs/object.js

@@ -0,0 +1,18 @@
+var _getLength = require('./_getLength.js');
+
+// Converts lists into objects. Pass either a single array of `[key, value]`
+// pairs, or two parallel arrays of the same length -- one of keys, and one of
+// the corresponding values. Passing by pairs is the reverse of `_.pairs`.
+function object(list, values) {
+  var result = {};
+  for (var i = 0, length = _getLength(list); i < length; i++) {
+    if (values) {
+      result[list[i]] = values[i];
+    } else {
+      result[list[i][0]] = list[i][1];
+    }
+  }
+  return result;
+}
+
+module.exports = object;