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/folder-plus.mjs

@@ -0,0 +1,20 @@
+/**
+ * lucide-react v0.0.1 - ISC
+ */
+
+import createLucideIcon from '../createLucideIcon.mjs';
+
+const FolderPlus = createLucideIcon("FolderPlus", [
+  [
+    "path",
+    {
+      d: "M4 20h16a2 2 0 0 0 2-2V8a2 2 0 0 0-2-2h-7.93a2 2 0 0 1-1.66-.9l-.82-1.2A2 2 0 0 0 7.93 3H4a2 2 0 0 0-2 2v13c0 1.1.9 2 2 2Z",
+      key: "1fr9dc"
+    }
+  ],
+  ["line", { x1: "12", x2: "12", y1: "10", y2: "16", key: "3c25pp" }],
+  ["line", { x1: "9", x2: "15", y1: "13", y2: "13", key: "10hoct" }]
+]);
+
+export { FolderPlus as default };
+//# sourceMappingURL=folder-plus.mjs.map