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/stretch-vertical.mjs

@@ -0,0 +1,19 @@
+/**
+ * lucide-react v0.0.1 - ISC
+ */
+
+import createLucideIcon from '../createLucideIcon.mjs';
+
+const StretchVertical = createLucideIcon("StretchVertical", [
+  [
+    "rect",
+    { width: "6", height: "20", x: "4", y: "2", rx: "2", key: "19qu7m" }
+  ],
+  [
+    "rect",
+    { width: "6", height: "20", x: "14", y: "2", rx: "2", key: "24v0nk" }
+  ]
+]);
+
+export { StretchVertical as default };
+//# sourceMappingURL=stretch-vertical.mjs.map