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/life-buoy.mjs

@@ -0,0 +1,17 @@
+/**
+ * lucide-react v0.0.1 - ISC
+ */
+
+import createLucideIcon from '../createLucideIcon.mjs';
+
+const LifeBuoy = createLucideIcon("LifeBuoy", [
+  ["circle", { cx: "12", cy: "12", r: "10", key: "1mglay" }],
+  ["path", { d: "m4.93 4.93 4.24 4.24", key: "1ymg45" }],
+  ["path", { d: "m14.83 9.17 4.24-4.24", key: "1cb5xl" }],
+  ["path", { d: "m14.83 14.83 4.24 4.24", key: "q42g0n" }],
+  ["path", { d: "m9.17 14.83-4.24 4.24", key: "bqpfvv" }],
+  ["circle", { cx: "12", cy: "12", r: "4", key: "4exip2" }]
+]);
+
+export { LifeBuoy as default };
+//# sourceMappingURL=life-buoy.mjs.map