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/plugin-transform-arrow-functions/lib/index.js

@@ -0,0 +1,29 @@
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+exports.default = void 0;
+var _helperPluginUtils = require("@babel/helper-plugin-utils");
+var _default = exports.default = (0, _helperPluginUtils.declare)((api, options) => {
+  var _api$assumption;
+  api.assertVersion(7);
+  const noNewArrows = (_api$assumption = api.assumption("noNewArrows")) != null ? _api$assumption : !options.spec;
+  return {
+    name: "transform-arrow-functions",
+    visitor: {
+      ArrowFunctionExpression(path) {
+        if (!path.isArrowFunctionExpression()) return;
+        {
+          path.arrowFunctionToExpression({
+            allowInsertArrow: false,
+            noNewArrows,
+            specCompliant: !noNewArrows
+          });
+        }
+      }
+    }
+  };
+});
+
+//# sourceMappingURL=index.js.map