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/lucide-react/dist/esm/icons/undo-2.mjs

@@ -0,0 +1,19 @@
+/**
+ * lucide-react v0.0.1 - ISC
+ */
+
+import createLucideIcon from '../createLucideIcon.mjs';
+
+const Undo2 = createLucideIcon("Undo2", [
+  ["path", { d: "M9 14 4 9l5-5", key: "102s5s" }],
+  [
+    "path",
+    {
+      d: "M4 9h10.5a5.5 5.5 0 0 1 5.5 5.5v0a5.5 5.5 0 0 1-5.5 5.5H11",
+      key: "llx8ln"
+    }
+  ]
+]);
+
+export { Undo2 as default };
+//# sourceMappingURL=undo-2.mjs.map