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/jsonpath/lib/parser.js

@@ -0,0 +1,21 @@
+var grammar = require('./grammar');
+var gparser = require('../generated/parser');
+
+var Parser = function() {
+
+  var parser = new gparser.Parser();
+
+  var _parseError = parser.parseError;
+  parser.yy.parseError = function() {
+    if (parser.yy.ast) {
+      parser.yy.ast.initialize();
+    }
+    _parseError.apply(parser, arguments);
+  }
+
+  return parser;
+
+};
+
+Parser.grammar = grammar;
+module.exports = Parser;