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/wallpaper.mjs

@@ -0,0 +1,21 @@
+/**
+ * lucide-react v0.0.1 - ISC
+ */
+
+import createLucideIcon from '../createLucideIcon.mjs';
+
+const Wallpaper = createLucideIcon("Wallpaper", [
+  ["circle", { cx: "8", cy: "9", r: "2", key: "gjzl9d" }],
+  [
+    "path",
+    {
+      d: "m9 17 6.1-6.1a2 2 0 0 1 2.81.01L22 15V5a2 2 0 0 0-2-2H4a2 2 0 0 0-2 2v10a2 2 0 0 0 2 2h16a2 2 0 0 0 2-2",
+      key: "69xh40"
+    }
+  ],
+  ["path", { d: "M8 21h8", key: "1ev6f3" }],
+  ["path", { d: "M12 17v4", key: "1riwvh" }]
+]);
+
+export { Wallpaper as default };
+//# sourceMappingURL=wallpaper.mjs.map