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/esm/setFunctionName.js

@@ -0,0 +1,12 @@
+import _typeof from "./typeof.js";
+function setFunctionName(e, t, n) {
+  "symbol" == _typeof(t) && (t = (t = t.description) ? "[" + t + "]" : "");
+  try {
+    Object.defineProperty(e, "name", {
+      configurable: !0,
+      value: n ? n + " " + t : t
+    });
+  } catch (e) {}
+  return e;
+}
+export { setFunctionName as default };