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/@babel/runtime/helpers/slicedToArray.js

@@ -0,0 +1,8 @@
+var arrayWithHoles = require("./arrayWithHoles.js");
+var iterableToArrayLimit = require("./iterableToArrayLimit.js");
+var unsupportedIterableToArray = require("./unsupportedIterableToArray.js");
+var nonIterableRest = require("./nonIterableRest.js");
+function _slicedToArray(r, e) {
+  return arrayWithHoles(r) || iterableToArrayLimit(r, e) || unsupportedIterableToArray(r, e) || nonIterableRest();
+}
+module.exports = _slicedToArray, module.exports.__esModule = true, module.exports["default"] = module.exports;