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/donut.mjs

@@ -0,0 +1,19 @@
+/**
+ * lucide-react v0.0.1 - ISC
+ */
+
+import createLucideIcon from '../createLucideIcon.mjs';
+
+const Donut = createLucideIcon("Donut", [
+  [
+    "path",
+    {
+      d: "M20.5 10a2.5 2.5 0 0 1-2.4-3H18a2.95 2.95 0 0 1-2.6-4.4 10 10 0 1 0 6.3 7.1c-.3.2-.8.3-1.2.3",
+      key: "19sr3x"
+    }
+  ],
+  ["circle", { cx: "12", cy: "12", r: "3", key: "1v7zrd" }]
+]);
+
+export { Donut as default };
+//# sourceMappingURL=donut.mjs.map