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/user-x.mjs

@@ -0,0 +1,15 @@
+/**
+ * lucide-react v0.0.1 - ISC
+ */
+
+import createLucideIcon from '../createLucideIcon.mjs';
+
+const UserX = createLucideIcon("UserX", [
+  ["path", { d: "M16 21v-2a4 4 0 0 0-4-4H6a4 4 0 0 0-4 4v2", key: "1yyitq" }],
+  ["circle", { cx: "9", cy: "7", r: "4", key: "nufk8" }],
+  ["line", { x1: "17", x2: "22", y1: "8", y2: "13", key: "3nzzx3" }],
+  ["line", { x1: "22", x2: "17", y1: "8", y2: "13", key: "1swrse" }]
+]);
+
+export { UserX as default };
+//# sourceMappingURL=user-x.mjs.map