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/group.mjs

@@ -0,0 +1,20 @@
+/**
+ * lucide-react v0.0.1 - ISC
+ */
+
+import createLucideIcon from '../createLucideIcon.mjs';
+
+const Group = createLucideIcon("Group", [
+  ["path", { d: "M3 7V5c0-1.1.9-2 2-2h2", key: "adw53z" }],
+  ["path", { d: "M17 3h2c1.1 0 2 .9 2 2v2", key: "an4l38" }],
+  ["path", { d: "M21 17v2c0 1.1-.9 2-2 2h-2", key: "144t0e" }],
+  ["path", { d: "M7 21H5c-1.1 0-2-.9-2-2v-2", key: "rtnfgi" }],
+  ["rect", { width: "7", height: "5", x: "7", y: "7", rx: "1", key: "1eyiv7" }],
+  [
+    "rect",
+    { width: "7", height: "5", x: "10", y: "12", rx: "1", key: "1qlmkx" }
+  ]
+]);
+
+export { Group as default };
+//# sourceMappingURL=group.mjs.map